Why Testicular Torsion Is a Surgical Emergency: The Twisted Cord and Blocked Blood Flow

It is 3 a.m. and a 14-year-old is standing in his parents’ doorway, pale, holding his groin, unable to explain why he woke up feeling as though something inside him had been wrung out like a dishcloth. His mother’s first instinct is the sensible one for almost every childhood ache: wait until morning, see if it settles. In this one case, that instinct is the most dangerous thing in the house.

Testicular torsion explained simply is a plumbing problem with a stopwatch attached. The cord that suspends the testicle rotates on itself, the veins pinch shut, then the artery does, and tissue that depends on a steady supply of oxygen starts to fail. Nothing about it is common, and everything about it is time-critical.

What follows is a plain account of what twists, why the first hours matter so much, what surgeons actually do once you arrive, and which widely repeated ideas about this condition are simply wrong.

Testicular torsion explained: what actually twists inside the scrotum

Each testicle hangs from a spermatic cord, a bundle roughly the thickness of a pencil that contains the testicular artery, a network of veins, nerves and the vas deferens, the tube that carries sperm. In most people the testicle is also anchored at its back edge to the inner lining of the scrotum, so it can move a little but cannot spin.

Some people are born without that anchor. In what surgeons call a bell clapper deformity, the thin covering that normally fixes the testicle in place instead wraps all the way around it, leaving the testicle dangling freely from the cord like the clapper inside a bell. It can swing, and it can rotate. The NIH’s StatPearls summary describes this anatomy as the main predisposing factor and estimates it is present in roughly 12 percent of males, the vast majority of whom never have a problem.

When rotation does happen, the cord may turn anywhere from a half turn to two full turns. The sequence that follows explains everything about the urgency. Veins are soft, low-pressure vessels, so they collapse first. Blood still flows in through the stiffer artery but cannot drain out, and the testicle swells and becomes congested. That swelling raises the pressure inside the cord until the artery is squeezed shut too. From that point the testicle is ischemic, meaning starved of oxygenated blood, and its cells begin to die.

The condition is uncommon: Cleveland Clinic puts the figure at about 1 in 4,000 males under 25. It is most frequent between ages 12 and 18, according to Mayo Clinic, but it can occur in newborns and in adults, which is why age alone should never be used to dismiss it.

What triggers testicular torsion?

Often nothing identifiable. A large share of cases begin during sleep, when a boy is lying still and doing nothing more provocative than dreaming. That fact alone should retire the idea that torsion is something a person brings on themselves.

There are, however, recognized circumstances in which the cord is more likely to rotate. Mayo Clinic lists vigorous activity, a minor injury to the scrotum, sleep and cold temperatures among the situations in which torsion has been reported. The common thread is the cremaster muscle, a thin sling of muscle fibers that lifts the testicle toward the body in response to cold, fear, arousal or physical effort. In a testicle that is not anchored, a sharp contraction of that muscle can impart a spin.

Puberty matters for a mechanical reason. The testicle gains weight quickly during adolescence, and Mayo Clinic notes that rapid growth in this period increases the chance of torsion. A heavier object on a free-swinging cord has more momentum, so the same small movement that would do nothing to a child’s testicle can rotate a teenager’s.

Family history is sometimes relevant, since the bell clapper arrangement can run in families, though most people who develop torsion have no relative with the condition. Previous episodes of sudden testicle pain that resolved on their own are a stronger warning sign, discussed later as intermittent torsion.

What is not on any mainstream list is worth stating clearly: tight underwear, cycling, masturbation and sexual activity are not established causes. They appear frequently in online forums and almost never in clinical guidance. The prerequisite for torsion is an anatomy present from birth, and the trigger is frequently a movement no one could have predicted or prevented.

Why is testicular torsion so scary? The clock on blood flow

Most conditions that cause severe pain give the body some margin. Appendicitis can smolder for a day. A kidney stone may take weeks to pass. Torsion is different because the organ involved has almost no tolerance for lost blood supply, and the window for saving it is measured in hours rather than days.

The figures quoted in clinical teaching are stark. The NIH’s StatPearls review describes testicular salvage rates of roughly 90 to 100 percent when the cord is untwisted within six hours of symptom onset, falling to about 50 percent at 12 hours and below 10 percent once 24 hours have passed. Mayo Clinic frames the same reality in plainer terms: treatment within six hours saves the testicle in most cases, the odds drop sharply after 12 hours, and after 24 hours the testicle usually has to be removed.

Two features of the condition make those hours easy to lose. First, the pain can be misattributed. The nerves that serve the testicle share pathways with the lower abdomen, so some patients, particularly younger children, describe belly pain and nausea rather than pain in the scrotum. A child vomiting and clutching his stomach may be assessed for a gut problem while the real emergency sits lower down.

Second, and more insidiously, the pain can fade. As tissue dies, the nerves that carry pain signals die with it. A teenager who suffers in silence for several hours and then feels the pain ease may conclude the crisis has passed, when in fact the opposite has happened. Cleveland Clinic and Mayo Clinic both warn that easing pain does not mean the testicle is safe.

The fear this condition inspires is therefore rational. The stakes are a permanent loss, the timeline is short, and the symptoms can mislead. The proportionate response is not panic but speed: emergency assessment for any sudden, severe testicle pain, no matter the hour.

Testicular torsion vs epididymitis and other causes of sudden testicle pain

Sudden pain in the scrotum has several possible explanations, and only torsion demands surgery within hours. Clinicians are trained to treat every case as torsion until proven otherwise, because the cost of missing it is so much higher than the cost of a false alarm. The table below shows the patterns that help an examining doctor tell the conditions apart. It is offered so you understand what the team is looking for, not so anyone can rule out torsion at home; these features overlap in real patients.

Feature	Testicular torsion	Epididymitis	Torsion of the appendix testis
Onset	Sudden, often within minutes, frequently during sleep	Gradual, builds over hours to days	Sudden or gradual
Typical age	Peak 12–18, any age possible	Sexually active adults, older men, some children	Children around 7–14
Testicle position	Often high-riding, may lie horizontally	Normal position	Normal position
Cremasteric reflex	Usually absent	Usually present	Usually present
Fever and urinary symptoms	Uncommon	Common	Uncommon
Doppler ultrasound	Reduced or absent blood flow	Increased blood flow	Normal testicular flow
Management	Emergency surgery	Antibiotics where infection is confirmed, rest, support	Usually rest and pain control

Epididymitis is inflammation of the epididymis, the coiled tube at the back of the testicle, most often from infection. The appendix testis is a tiny leftover of embryonic tissue that can twist harmlessly on its own stalk; it sometimes shows as a small blue dot through the skin. Incarcerated hernias and trauma round out the list. According to the NIH’s StatPearls review, none of these distinctions is reliable enough to skip imaging or surgical assessment when the story fits torsion.

How is testicular torsion diagnosed in the emergency department?

The assessment moves quickly because the diagnosis is, at heart, clinical. A doctor will ask when the pain began to the nearest hour, whether it started during sleep or activity, whether there has been nausea or vomiting, and whether anything similar has happened before. Precision about timing matters more here than in almost any other emergency history.

The examination looks for a swollen, exquisitely tender testicle sitting higher than its partner or lying sideways. The doctor will usually stroke the inner thigh to test the cremasteric reflex, the normal upward twitch of the testicle on the same side. StatPearls describes an absent reflex as one of the more sensitive signs of torsion, though its presence does not exclude the diagnosis. Some pediatric teams use a structured scoring tool that combines swelling, hardness, position, nausea and the reflex to grade how likely torsion is; a high score can justify going straight to surgery.

Color Doppler ultrasound is the imaging test of choice. It is a standard ultrasound with a mode that displays blood movement as color, so a testicle with little or no flow stands out against the healthy side. Mayo Clinic notes it is accurate in most cases but can miss early or partial torsion where some flow persists. A normal scan therefore lowers the probability but does not settle the question if the examination is worrying.

A urine sample helps distinguish infection. Blood tests add little and should never delay the operating room.

The organizing principle, stated by Mayo Clinic and echoed across guidance, is that imaging must not cost time. When the history and examination point clearly to torsion, surgeons frequently proceed to exploration without waiting for an ultrasound, accepting that some of those operations will find a different cause. A negative exploration is a minor procedure; a lost testicle is permanent.

What happens during surgery for testicular torsion?

The operation is called scrotal exploration, and it is performed under general anesthesia, which means the patient is fully asleep. Consent is taken for two possible outcomes, because the surgeon cannot know until the testicle is seen whether it can be kept.

A small incision is made in the scrotum, usually along the midline or over the affected side. The surgeon opens the coverings, identifies the twisted cord and rotates the testicle back to its normal position. The color of the tissue then tells the story. A testicle that has been deprived of blood for a short time is dusky or purple and, once untwisted, gradually pinks up over several minutes as flow returns. Surgeons often wrap it in warm saline gauze and wait to see whether that recovery happens.

If the testicle is viable, the surgeon performs an orchiopexy: fine, permanent stitches fix the testicle to the inner wall of the scrotum so it cannot rotate again. Because the bell clapper arrangement is commonly present on both sides, Cleveland Clinic and StatPearls both describe fixing the opposite, unaffected testicle during the same operation as standard practice.

If the testicle is black, does not recover color and shows no bleeding when the surface is nicked, it is not salvageable and is removed. The medical term is orchiectomy. Leaving dead tissue in place risks infection and, by some accounts, immune reactions against the remaining testicle, so removal is the safer course. The other side is still fixed.

Before surgery, some emergency doctors attempt manual detorsion, gently rotating the testicle outward, as if opening a book, to relieve the twist temporarily. Mayo Clinic describes this as a bridge to the operating room, not a substitute for it, since the underlying anatomy is unchanged and the cord can twist again within hours.

Who goes to surgery immediately, and who may be asked to wait?

Anyone with a credible suspicion of acute torsion goes to the operating room as soon as it can be arranged. There is no version of this condition in which watchful waiting at home is appropriate, and no age group is exempt. That includes adults in their thirties and forties who assume it is a teenager’s problem, and it includes children too young to say where the pain is.

A different pathway applies to a few related situations. Someone whose pain has fully resolved and whose examination and ultrasound are normal may be diagnosed with intermittent torsion. These patients are usually not rushed to theater that night but are commonly offered a planned orchiopexy on both sides in the following weeks, according to StatPearls, because the next episode may not release on its own.

Children with torsion of the appendix testis are generally managed with rest and pain control once the diagnosis is secure, since the testicle itself is not at risk.

Newborns are a special case. Perinatal torsion, which happens before or shortly after birth, typically presents as a firm, discolored, often painless swelling. By the time it is discovered the testicle is frequently no longer viable, and approaches to timing of surgery and to fixing the opposite side vary between centers, as StatPearls acknowledges. Parents in this position should expect a careful conversation rather than a single fixed rule.

People who have lost a testicle and are considering a prosthesis, a silicone implant that restores the appearance of the scrotum, are usually asked to wait until the wound has healed fully and, in adolescents, sometimes until growth is complete, so that the implant can be sized to match.

In every one of these scenarios the decision rests with the treating surgical team, who weigh the examination, imaging and the individual’s circumstances together.

Can testicle torsion fix itself? Understanding intermittent torsion

Sometimes, briefly, and never reliably. The cord can untwist spontaneously, and when it does the pain lifts within minutes. People who have experienced this often describe an episode that felt catastrophic and then vanished, leaving them unsure whether anything really happened.

Clinicians call this intermittent torsion, and they take it seriously precisely because it tends to repeat. Each episode is the same mechanical event as a full torsion, cut short by luck. The anatomy that allowed the first rotation is unchanged, and the next twist may hold. Mayo Clinic lists a history of pain that comes and goes as a recognized risk factor for a complete torsion, and StatPearls describes elective orchiopexy as the usual recommendation once the pattern is identified.

The danger in the phrase “fix itself” is the false reassurance it offers during an actual emergency. Consider two different reasons pain might ease. In the first, the cord releases, blood flow returns, and the testicle recovers. In the second, hours have passed, the tissue has died, and the pain-carrying nerves have died with it. From the outside these feel similar. From the inside of the scrotum they are opposites, and only an examination and ultrasound can tell which has occurred.

A practical rule follows. Any episode of sudden, severe testicle pain deserves same-day medical assessment even if it has fully resolved by the time you reach the clinic or emergency department. If pain is ongoing, the answer is not a clinic appointment but the emergency department now. Waiting to see whether something settles is a reasonable strategy for most aches in life, and the wrong one here.

Repeated episodes that have been mentioned casually at a routine appointment, or dismissed as growing pains, should be raised again explicitly. The words to use are simple: sudden testicle pain that came and went.

Does ejaculating cause testicular torsion?

There is no established causal link between ejaculation, masturbation or sexual intercourse and testicular torsion. None of the major clinical sources cited in this article, from Mayo Clinic to the NIH’s StatPearls review, lists sexual activity among recognized causes. The idea persists online partly because the condition affects teenagers, an age group already carrying a heavy load of misinformation and embarrassment about their bodies.

Mechanically, the concern is understandable. The cremaster muscle contracts during arousal, drawing the testicles upward, and cremaster contraction is one of the movements thought to initiate rotation in a testicle that lacks a normal anchor. But the same muscle contracts when you step into cold water, when you are startled, when you run, and, as a large fraction of cases show, while you are asleep. Torsion has been reported in all of these settings. Sexual activity is not singled out in the evidence, and there is no indication that abstaining from it offers protection.

What matters is the bell clapper arrangement present from birth. Without it, no amount of activity of any kind produces torsion. With it, torsion can follow almost any movement, or none.

This distinction has a practical edge. Teenagers who develop pain during or after sex or masturbation sometimes delay seeking help out of shame, convinced they caused the problem and will have to explain how. Emergency clinicians see testicle pain routinely, are not interested in assigning blame, and need only one piece of information from the story: when it started. A delay driven by embarrassment costs exactly the same hours as a delay driven by anything else.

Guilt, in short, has no place in this diagnosis. The timing is coincidence, and the treatment is the same regardless of what someone was doing when the pain began.

What testicular torsion surgery recovery usually looks like

The operation is brief and the hospital stay usually short. Cleveland Clinic describes most patients going home the same day or after one night, with the wound closed by dissolving stitches that do not need removal.

The first few days bring swelling, bruising and soreness across the scrotum, which can look alarming and is expected. Snug supportive underwear reduces movement and helps with discomfort. A cold pack wrapped in cloth, applied in short spells, eases swelling. Pain relief is prescribed by the surgical team, and the dose, type and duration are theirs to set; this article does not give medication details.

Most people are back to school or desk work within about a week, per Cleveland Clinic guidance, though tiredness after anesthesia can linger for a few days. The restrictions that matter concern the wound and the stitches inside. Cleveland Clinic advises avoiding strenuous exercise, contact sports, heavy lifting and sexual activity for a few weeks, and the exact timeline is set at follow-up depending on how healing looks. Showering is generally permitted once the team says so; soaking in baths is typically deferred until the incision has sealed.

A follow-up appointment checks the wound and, where the testicle was saved, its size and blood flow. Testicles that were ischemic for several hours before rescue can shrink over subsequent months, a process called atrophy, so the team may arrange a later ultrasound. Where the testicle was removed, the conversation about a prosthesis usually begins at this visit rather than in the emergency setting.

The emotional recovery deserves equal attention. Teenagers in particular may feel frightened, self-conscious or angry at what happened to them in their sleep. Plain information about fertility and appearance, offered early and repeated, does more good than reassurance offered once.

What people often get wrong about testicular torsion

The myths around this condition are not harmless trivia. Several of them directly cost the hours that decide whether a testicle survives.

“It only happens to teenagers.” Adolescence is the peak, but Mayo Clinic and MedlinePlus both note that torsion occurs in newborns and adults. Age reassures no one.

“The pain would be unbearable, so this can’t be it.” Most cases are severe, but some present with moderate pain, or with abdominal pain and vomiting rather than scrotal pain. Children may simply refuse to walk or cry inconsolably.

“The pain is fading, so it’s getting better.” Easing pain after several hours can mean the tissue has died. Cleveland Clinic explicitly warns against this interpretation.

“A normal ultrasound rules it out.” Doppler can miss early or partial torsion. The examination and the story carry weight of their own.

“It was caused by masturbation, sex, cycling or tight underwear.” None of these appears in mainstream clinical guidance as a cause. The anatomy is congenital.

“If I lose one testicle I won’t be able to have children or go through puberty.” One healthy testicle usually produces sufficient hormones and sperm, as discussed in the next section.

“The other side is safe once the first is fixed.” The bell clapper arrangement is frequently present on both sides, which is exactly why surgeons fix both.

“It’s rare, so it’s not worth a night in the emergency department.” Roughly 1 in 4,000 males under 25, according to Cleveland Clinic, is rare in the population and irrelevant to the individual in pain. The consequence of a missed case is permanent; the consequence of a false alarm is a few hours and, at most, a small negative exploration.

The most expensive misconception is the quietest: that sudden testicle pain is something to be endured privately. It is not.

Fertility, hormones and life with one testicle after torsion

The question parents ask in the corridor and teenagers ask once the parents have left is the same: what does this mean for the future? The evidence-based answer is more reassuring than most people expect, with honest caveats.

On hormones, a single healthy testicle typically produces enough testosterone to drive normal puberty, muscle development, voice change, libido and erectile function. Cleveland Clinic and Mayo Clinic both state that men with one testicle generally have normal hormone levels. Where a testicle was saved but later shrinks, hormone production from that side may be reduced, and the remaining testicle usually compensates.

On fertility, Mayo Clinic notes that loss of a testicle can affect fertility, but that many men with one testicle father children without difficulty. Sperm counts in this group are, on average, somewhat lower than in men with two testicles, and the degree of any reduction depends partly on how long the affected testicle was without blood flow before surgery and on the health of the other side. Some research has raised the possibility that a damaged testicle left in place could provoke an immune response affecting the other, one reason surgeons remove clearly non-viable tissue; the NIH’s StatPearls review describes this evidence as inconclusive. Semen analysis in adulthood is available for anyone who wants concrete information rather than averages.

On appearance, a testicular prosthesis restores the look and feel of two testicles and involves a short planned operation once healing is complete. Some choose it, many do not, and neither choice is medically superior.

On daily life, there are no activity restrictions once recovery is complete. The stitched testicle is not fragile, and normal sport, sex and exercise resume. Some men choose supportive protection during contact sports, a personal preference rather than a requirement.

Where worries persist, asking for a referral to a urologist or fertility specialist for a proper conversation is entirely reasonable, and the treating team can arrange it.

Questions to ask your care team about testicular torsion

Emergencies leave little room for questions on the way to the operating room, and that is appropriate; the team’s priority is speed. Most of the useful conversation happens afterward, at the bedside or in clinic. Writing questions down helps, because the details blur in the hours after anesthesia.

• Was the testicle saved, and how long do you estimate the blood supply was interrupted?
• Did you fix the other testicle as well, and what does that involve going forward?
• If the testicle was removed, when is the right time to talk about a prosthesis, and what does that operation involve?
• What should the wound look like over the next week, and what changes would you want to hear about?
• When can I shower, bathe, return to school or work, exercise, play sport and resume sexual activity?
• Will you arrange a follow-up ultrasound to check the size and blood flow of the saved testicle, and when?
• Could this happen again on either side, and what symptoms should prompt an emergency visit?
• How might this affect hormone levels or fertility, and is there a point at which a semen analysis or hormone test would be useful?
• Is there anyone in the family, such as brothers, who should know about episodes of sudden testicle pain?
• Who do I contact if I have a concern out of hours?

For parents of younger children, two further questions are worth asking: how to explain the operation to the child in age-appropriate terms, and whether the team has written information suitable for a school nurse. For adolescents, asking for a few minutes with the doctor without a parent present is a normal request that most teams accommodate readily; it often surfaces the questions that matter most to the patient.

Every answer will be specific to the operation performed and the findings inside, which is why general articles, including this one, can frame the questions but never replace the conversation.

When to call your doctor: red-flag signs before and after surgery

Before any diagnosis, the rule is unambiguous. Sudden, severe pain in one testicle or the scrotum, particularly if it started abruptly, woke someone from sleep, or is accompanied by nausea, vomiting or a testicle that looks swollen, higher or differently angled, is an emergency. Go to the nearest emergency department or call emergency services immediately. Do not wait for morning, do not book a routine appointment, and do not wait to see whether it eases. Pain that has already settled after an episode like this still needs same-day assessment, because intermittent torsion recurs.

In young children and infants, the signs are less direct: inconsolable crying, refusal to walk, a firm or discolored scrotum, or persistent vomiting with abdominal pain. Any of these should prompt urgent medical review with the scrotum examined.

After scrotal exploration and orchiopexy, contact the surgical team or seek urgent care for any of the following, as described in Cleveland Clinic’s post-operative guidance and standard wound care advice:

• Fever, or chills, in the days after surgery.
• Redness spreading from the incision, warmth, pus, a foul smell or the wound edges separating.
• Rapidly increasing swelling of the scrotum, or a scrotum that becomes tense, hard and dark, which can indicate bleeding inside.
• Pain that worsens instead of steadily improving, or pain not controlled by the relief prescribed.
• New severe pain on either side, which could signal torsion despite fixation and must be treated as a fresh emergency.
• Difficulty passing urine, or blood in the urine.
• Nausea, vomiting or dizziness that does not settle after the first day.

Persistent worry with none of these signs still warrants a call. Surgical teams would far rather answer a question about normal bruising than learn later that something was missed. Every decision about further tests, treatment or return to the operating room rests with the treating clinicians, who know exactly what was found and done.

Frequently asked questions

Does ejaculating cause testicular torsion?

No established link exists between ejaculation, masturbation or sex and testicular torsion. Major clinical sources list sleep, cold, minor injury, vigorous activity and rapid growth in puberty as circumstances in which torsion has occurred, not sexual activity. The real prerequisite is a congenital anatomy that lets the testicle rotate. Pain that begins during or after sex still needs immediate emergency assessment.

What triggers testicular torsion?

Often nothing identifiable, and a large share of cases begin during sleep. Recognized circumstances include cold temperatures, minor scrotal injury, vigorous exercise and the rapid growth of the testicle during puberty, all of which can cause the cremaster muscle to contract sharply and spin an unanchored testicle. The underlying bell clapper deformity, present from birth, is what makes the twist possible.

Why is testicular torsion so scary?

Because the testicle tolerates loss of blood flow for only a few hours, and the symptoms can mislead. Guidance describes the best chance of saving the testicle within about six hours, with steep declines after 12 and 24 hours. Pain may be felt in the abdomen rather than the scrotum, and it can fade as tissue dies, tempting people to wait when waiting is the one thing that causes permanent harm.

Can testicle torsion fix itself?

Occasionally the cord untwists on its own and pain resolves within minutes, a pattern called intermittent torsion. It cannot be relied upon, and it tends to recur, so clinicians usually recommend planned surgery to fix both testicles after such an episode. Pain that fades after several hours may reflect tissue death rather than release, so any episode needs same-day assessment even if it has settled.

How long do you have to treat testicular torsion?

The NIH’s StatPearls review describes salvage rates of roughly 90 to 100 percent when surgery happens within six hours of symptom onset, about 50 percent at 12 hours and under 10 percent beyond 24 hours. Mayo Clinic gives the same broad picture. These are population figures, not guarantees for any individual, and the practical message is to seek emergency care immediately rather than calculate margins.

Can adults get testicular torsion?

Yes. The peak is between ages 12 and 18, but Mayo Clinic and MedlinePlus both note torsion in newborns and in adults, including men in their thirties and forties. Adults sometimes delay because they assume it is an adolescent condition, and older patients are more likely to be misdiagnosed with infection. Sudden severe testicle pain at any age warrants emergency assessment.

Does testicular torsion pain go away on its own?

It can, for two very different reasons. The cord may release spontaneously, restoring blood flow, or the tissue may die after several hours and stop sending pain signals. These feel similar from the outside and are opposites in consequence. Cleveland Clinic and Mayo Clinic both caution that easing pain is not a sign of safety, and only examination and Doppler ultrasound can tell which has happened.

Will surgery be done on both testicles?

Usually, yes. Because the bell clapper deformity that allows twisting is frequently present on both sides, surgeons typically stitch the unaffected testicle to the scrotal wall during the same operation, whether the twisted testicle is saved or removed. This preventive fixation is described as standard practice by Cleveland Clinic and the NIH’s StatPearls review, though the treating surgeon makes the final decision.

Can you still have children after losing a testicle to torsion?

Many men with one testicle father children. Mayo Clinic notes that losing a testicle can affect fertility, and average sperm counts tend to be somewhat lower than in men with two, but one healthy testicle usually produces sufficient sperm and testosterone. Anyone concerned can ask their care team about a semen analysis in adulthood for individual rather than average information.

What is the difference between testicular torsion and epididymitis?

Torsion is a twisted cord cutting off blood flow; epididymitis is inflammation, usually infectious, of the tube behind the testicle. Torsion typically starts suddenly, often during sleep, with a high-riding testicle and absent cremasteric reflex, while epididymitis builds over days with fever and urinary symptoms. Doppler ultrasound shows reduced flow in torsion and increased flow in epididymitis. Only torsion requires emergency surgery.

References

• Cleveland Clinic: Testicular torsion
• MedlinePlus Medical Encyclopedia: Testicular torsion
• NIH National Library of Medicine, StatPearls: Testicular Torsion
• NHS: Testicle lumps and swellings

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.