Orchitis

What is orchitis?

Orchitis is inflammation of one or both testicles (the two oval glands inside the scrotum that make sperm and the hormone testosterone). The word comes from the Greek term for testicle. Inflammation is the body’s response to infection or injury, and in the testicle it usually causes swelling, pain, and tenderness that can develop over hours or days.

Orchitis is often grouped with a closely related condition called epididymitis, which is inflammation of the epididymis, the coiled tube behind each testicle that stores and carries sperm. Because the two structures sit so close together, infection often spreads from one to the other. When both are inflamed at the same time, doctors use the term epididymo-orchitis. In everyday practice, orchitis on its own is less common than the combined form.

The condition can affect boys and men of any age. In children and unvaccinated teenagers, it has traditionally been linked to the mumps virus. In sexually active men, sexually transmitted infections are a frequent cause. In older men, bacteria that travel from the urinary tract or prostate are more often responsible. Understanding what is orchitis, and what is causing it in a particular person, matters because the likely cause guides the treatment.

Orchitis symptoms

Orchitis symptoms can begin suddenly or build gradually. Many people first notice a heavy, aching feeling in the scrotum that turns into pain and visible swelling. The symptoms below are commonly reported, although not everyone experiences all of them.

• Pain in one or both testicles, ranging from a dull ache to severe pain
• Swelling of the scrotum, which may look red or feel warm to the touch
• Tenderness when the testicle is touched or when walking
• A feeling of heaviness in the scrotum
• Fever and chills
• Nausea or vomiting
• Pain when urinating or a need to urinate more often, especially when a urinary infection is involved
• Discharge from the penis, more typical when a sexually transmitted infection is the cause
• Blood in the semen (less common)
• General tiredness or feeling unwell

The pattern of symptoms often differs by cause. When orchitis follows mumps, testicular swelling typically appears several days after the characteristic swelling of the salivary glands in the face and jaw. Bacterial orchitis and epididymo-orchitis more often develop over one to two days and may be accompanied by urinary symptoms. In the early stage, the pain may be mild and easy to dismiss; in a more advanced stage, the scrotum can become very swollen and the skin tight and shiny.

It is important to know that testicular pain has other possible causes, including testicular torsion, a condition in which the testicle twists and cuts off its own blood supply. Torsion is a surgical emergency and can feel similar to orchitis in the first hours. For this reason, sudden severe testicular pain should never be self-diagnosed as orchitis.

Causes and risk factors

Orchitis causes fall into two broad groups: viral and bacterial. Occasionally no infectious cause is found, and the inflammation is described as idiopathic, meaning of unknown origin.

Viral orchitis. The best-known viral cause is the mumps virus. Mumps orchitis mainly affects boys after puberty and men who have not been vaccinated. Widespread use of the measles, mumps, and rubella (MMR) vaccine has made this cause much less common in many countries, although outbreaks still occur. Other viruses have been reported as rare causes.

Bacterial orchitis. Bacteria usually reach the testicle by spreading from the epididymis, the urethra (the tube that carries urine out of the body), the bladder, or the prostate. Common sources include:

• Sexually transmitted infections such as chlamydia and gonorrhea, particularly in sexually active younger men
• Urinary tract infections caused by gut bacteria such as Escherichia coli, more typical in older men and in boys with urinary tract abnormalities
• Prostatitis, an infection or inflammation of the prostate gland
• Tuberculosis and brucellosis in regions where these infections are common (rare causes)

Risk factors. Several factors make orchitis more likely:

• Not being vaccinated against mumps
• Having a new sexual partner, multiple partners, or sex without a condom
• A history of sexually transmitted infections
• An enlarged prostate or other conditions that block normal urine flow
• Having a urinary catheter or recent instruments passed into the urinary tract
• Recent surgery on the urinary or genital tract
• Structural differences in the urinary tract present from birth, mainly relevant in boys
• A weakened immune system

Orchitis itself is not contagious, but the infections that cause it, such as mumps or a sexually transmitted infection, can be passed to other people.

Orchitis diagnosis

Orchitis diagnosis begins with a conversation and a physical examination. Your doctor will ask when the pain started, how quickly it developed, whether you have fever or urinary symptoms, your sexual history, and whether you have been vaccinated against mumps. During the examination, the doctor gently checks the scrotum for swelling, warmth, and tenderness, and may examine the prostate through the rectum if a prostate infection is suspected. Enlarged lymph nodes in the groin and swelling of the salivary glands are also noted.

Because the most urgent priority is to rule out testicular torsion, imaging is often arranged quickly. The main tests used include:

• Scrotal ultrasound with Doppler. Ultrasound uses sound waves to produce images without radiation. The Doppler function shows blood flow. In orchitis, blood flow to the affected testicle is typically increased; in torsion, it is reduced or absent. This single test is central to telling the two conditions apart.
• Urine tests. A urine sample is examined for signs of infection and may be cultured, which means growing any bacteria in a laboratory to identify them and find out which antibiotics work against them.
• Urethral swab or first-catch urine test for sexually transmitted infections. These detect chlamydia and gonorrhea. Testing for other sexually transmitted infections may be offered at the same time.
• Blood tests. A blood count can show signs of infection or inflammation. If mumps is suspected, a blood test for mumps antibodies may be requested.
• Additional imaging. In unusual or slowly resolving cases, further scans may be used to look for an abscess (a collection of pus) or other problems.

There is no single laboratory criterion that confirms orchitis. Doctors combine the history, examination findings, and ultrasound appearance to reach the diagnosis, and then use urine and swab results to identify the specific cause. In hospitals with a dedicated urology department, urologists (doctors who specialize in the urinary tract and male reproductive organs) usually manage the assessment and follow-up. At Acibadem, this condition falls under the urology department.

Orchitis treatment options

Orchitis treatment options depend on the cause, the severity of symptoms, and the person’s age and overall health. The aims are to clear any infection, relieve pain, prevent complications, and protect fertility where possible.

Supportive care for all types. Whatever the cause, several measures help the testicle recover and ease discomfort:

• Rest, ideally lying down, during the most painful days
• Supporting the scrotum with snug underwear or an athletic supporter to reduce the pulling sensation
• Applying cold packs wrapped in a cloth to the scrotum for short periods
• Over-the-counter anti-inflammatory pain relievers such as ibuprofen, if they are safe for you, or acetaminophen (paracetamol)
• Avoiding heavy lifting and sexual activity until symptoms settle

Viral orchitis, including mumps orchitis. Antibiotics do not work against viruses, so treatment is supportive. Symptoms usually improve over one to two weeks, although the testicle can remain tender for longer. Your doctor may still prescribe an antibiotic if there is doubt about whether bacteria are also involved.

Bacterial orchitis and epididymo-orchitis. Antibiotics are the main treatment. The choice depends on the most likely source of infection. If a sexually transmitted infection is suspected, antibiotics that target chlamydia and gonorrhea are typically used, and recent sexual partners are advised to be tested and treated to prevent reinfection. If a urinary tract source is more likely, a different antibiotic is chosen, and the prescription may be adjusted once culture results are available. It is important to finish the full course even when symptoms improve early. Most people are treated at home, but hospital admission with antibiotics given into a vein may be needed for high fever, vomiting, severe pain, or signs of a spreading infection.

Procedures and surgery. Surgery is rarely needed for orchitis. It may be considered when an abscess forms and needs to be drained, when infection has destroyed the tissue of the testicle, or when the diagnosis is uncertain and testicular torsion cannot be excluded. If an underlying blockage in the urinary tract is found, treating that problem may be recommended to prevent further infections.

Follow-up and recovery. Your doctor may ask to see you again after a few days to confirm the infection is responding, and later to check that the swelling has resolved. Persistent firmness or a lump after recovery should always be checked, because it needs to be distinguished from other conditions. Rehabilitation in the formal sense is not usually required; a gradual return to normal activity and sport is typical once pain has gone.

Living with orchitis and outlook

For most people, orchitis is a short-term illness. Pain and swelling usually begin to improve within days of starting the right treatment, and full recovery often takes a few weeks. Many men return to work and daily activities within a week, although lingering tenderness is common.

Complications are uncommon but can occur. They include:

• Testicular atrophy, a shrinking of the affected testicle, which is seen more often after mumps orchitis
• Abscess formation within the scrotum
• Chronic (long-lasting) pain or repeated episodes, particularly if the underlying cause is not fully treated
• Reduced fertility, which is possible when both testicles are affected but is unusual when only one is involved
• Infertility, which is rare

Hormone production is usually preserved, because the unaffected testicle can compensate. If you are concerned about future fertility, your doctor may discuss semen analysis some months after recovery. Men who develop orchitis because of a sexually transmitted infection can reduce the chance of recurrence by consistent condom use and by ensuring partners are treated. Men whose orchitis is related to prostate enlargement or urinary problems may benefit from longer-term urological follow-up.

No doctor can promise a particular outcome, but with prompt assessment and appropriate treatment, the outlook for orchitis is generally good.

Frequently asked questions

What is orchitis, and is it the same as epididymitis?

Orchitis is inflammation of the testicle, while epididymitis is inflammation of the epididymis, the tube behind the testicle. They are separate conditions but frequently occur together, in which case the term epididymo-orchitis is used. The symptoms overlap, and the causes and treatments are largely similar, which is why doctors often discuss them as a single group.

How do orchitis symptoms differ from testicular torsion?

Both cause testicular pain and swelling, and they can be hard to tell apart without an ultrasound. Torsion tends to start very suddenly, often with severe pain and sometimes vomiting, and may occur after exercise or during sleep. Orchitis more often builds over hours to days and is more likely to include fever or urinary symptoms. Because torsion needs surgery within hours to save the testicle, any sudden severe testicular pain should be assessed urgently rather than assumed to be orchitis.

What are the most common orchitis causes?

In sexually active men, sexually transmitted infections such as chlamydia and gonorrhea are common causes. In older men and young boys, bacteria from the urinary tract or prostate are more typical. The mumps virus is the classic viral cause, mostly in people who have not been vaccinated. Sometimes the exact cause is never identified.

How is orchitis diagnosis confirmed?

There is no single confirming test. Your doctor combines your history and a physical examination with a scrotal ultrasound, which shows increased blood flow in an inflamed testicle and helps rule out torsion. Urine tests, swabs for sexually transmitted infections, and sometimes blood tests are used to identify the cause so that the right treatment can be chosen.

What are the orchitis treatment options if it is caused by a virus?

Antibiotics do not work against viruses, so viral orchitis is managed with rest, scrotal support, cold packs, and pain relievers while the body clears the infection. Symptoms usually ease over one to two weeks. Your doctor may still consider antibiotics if a bacterial infection cannot be excluded.

Can orchitis affect fertility?

Orchitis can reduce sperm production in the affected testicle, and the testicle sometimes shrinks after recovery, especially after mumps orchitis. When only one testicle is affected, fertility is usually maintained. Reduced fertility is more of a concern when both testicles are involved, and permanent infertility is rare. Your doctor can discuss testing if you have concerns.

How long does orchitis take to heal?

Pain and fever often start to improve within a few days of appropriate treatment, but swelling and tenderness can take several weeks to settle completely. Recovery times vary with the cause, how early treatment started, and individual health. If symptoms are not improving after a few days of treatment, a review is advisable.

When to see a doctor

Any new testicular pain or swelling should be assessed by a healthcare professional, because several conditions look alike and some need urgent treatment. Seek emergency care immediately if you notice any of the following red-flag signs:

• Sudden, severe testicular pain, especially if it began abruptly or woke you from sleep
• Pain with nausea or vomiting
• A testicle that sits higher than usual or at an unusual angle
• High fever, shaking chills, or confusion
• Rapidly increasing swelling, or scrotal skin that is turning dark, purple, or black
• Inability to pass urine
• Testicular pain after an injury that does not ease within an hour

Arrange a routine appointment soon if you have milder testicular discomfort lasting more than a day or two, discharge from the penis, burning when you urinate, a lump or firmness that remains after an episode of orchitis, or repeated episodes of scrotal pain. Prompt assessment allows the cause to be identified and treated before complications develop.