Hidradenitis Suppurativa

What is hidradenitis suppurativa?

Hidradenitis suppurativa is a long-term (chronic) skin condition that causes painful lumps to form under the skin, most often in areas where skin rubs against skin. Common sites include the armpits, the groin, the inner thighs, the buttocks, and the skin under the breasts. Over time, these lumps can break open, leak fluid or pus, and form tunnels under the skin called sinus tracts. The condition is sometimes called acne inversa, although it is a separate condition from ordinary acne.

Many people ask what is hidradenitis suppurativa and whether it is an infection or a hygiene problem. It is neither. Hidradenitis suppurativa is an inflammatory condition, meaning it is driven by the body’s own immune response around hair follicles (the small openings in the skin from which hairs grow). It is not caused by being unclean, and it is not contagious, so it cannot be passed to another person through touch or shared items.

The condition usually begins after puberty, most often in a person’s twenties or thirties. It affects women more often than men in many populations. Hidradenitis suppurativa can range from mild, with occasional small lumps, to severe, with widespread abscesses (collections of pus), scarring, and tunnels under the skin. Because it tends to come and go over many years, early recognition and consistent care can make a meaningful difference in how the condition develops.

Symptoms of hidradenitis suppurativa

Hidradenitis suppurativa symptoms usually start gradually and may be mistaken at first for boils, ingrown hairs, or infected cysts. A key clue is that the lumps keep coming back in the same body areas, often on both sides of the body.

Common signs and symptoms include:

• Painful, deep lumps (nodules) under the skin, often in the armpits, groin, buttocks, inner thighs, or under the breasts.
• Blackhead-like bumps, sometimes appearing in pairs, in the affected areas.
• Abscesses — swollen, tender collections of pus that may break open and drain fluid that can have an unpleasant odor.
• Tunnels under the skin (sinus tracts) that connect lumps and may leak fluid on and off for long periods.
• Scarring and thickened skin in areas affected repeatedly over time.
• Itching, burning, or tenderness in an area before a new lump appears.

Doctors often describe the severity of hidradenitis suppurativa using stages, commonly known as Hurley stages:

• Stage 1 (mild): single or a few separate lumps or abscesses, without tunnels or significant scarring.
• Stage 2 (moderate): recurrent abscesses with some tunnel formation and scarring, but with areas of normal skin in between.
• Stage 3 (severe): widespread involvement of an area, with many connected tunnels, abscesses, and extensive scarring.

Symptoms often flare and then quiet down, sometimes in cycles. In some people, flares seem to be linked to hormonal changes, such as before menstrual periods. Beyond the skin itself, the pain, drainage, and appearance of the lesions can affect sleep, movement, work, intimacy, and mood, so it is worth telling your doctor about these effects as well.

Causes and risk factors

The exact hidradenitis suppurativa causes are not fully understood, but research points to a process that begins in the hair follicle. The follicle becomes blocked, then ruptures under the skin, and the immune system reacts strongly to the material released. This ongoing inflammation leads to the lumps, abscesses, and tunnels typical of the condition. Sweat glands were once thought to be the main problem, which is how the condition got its name, but current understanding centers on the hair follicle and the immune response.

Several factors appear to increase the risk of developing hidradenitis suppurativa or of having more severe disease:

• Family history: roughly one in three people with the condition has a relative who also has it, suggesting a genetic contribution in many cases.
• Hormones: the condition usually starts after puberty and may flare with hormonal changes, which suggests hormones play a role.
• Smoking: tobacco smoking is strongly associated with hidradenitis suppurativa and may worsen its course.
• Excess body weight: being overweight is linked to more frequent and more severe symptoms, possibly because of friction, sweating, and inflammation.
• Sex: women are affected more often than men in many studies, although men can develop severe disease.
• Other inflammatory conditions: hidradenitis suppurativa occurs more often in people with certain conditions such as inflammatory bowel disease (long-term inflammation of the digestive tract) and metabolic syndrome (a group of conditions including high blood pressure and high blood sugar).

Friction from tight clothing, heat, and sweating may trigger flares in some people, but they do not cause the underlying condition. It is important to repeat that poor hygiene does not cause hidradenitis suppurativa, and the condition cannot be spread to others.

Diagnosis

Hidradenitis suppurativa diagnosis is usually made clinically, meaning a doctor confirms it by examining the skin and asking about your history rather than by relying on a single laboratory test. There is no blood test that proves someone has the condition.

Doctors generally look for three features together:

• Typical lesions: deep painful lumps, abscesses, draining tunnels, blackhead-like bumps, or characteristic scars.
• Typical locations: armpits, groin, genital area, buttocks, inner thighs, or under the breasts.
• A recurring pattern: lesions that come back repeatedly over months, often in the same areas, rather than a single one-time boil.

During the visit, the doctor may ask when the lumps began, how often they return, whether family members have similar problems, whether you smoke, and how the condition affects your daily life. Because the affected areas are often private, some people delay seeking care; dermatologists (skin specialists) examine these areas routinely and the assessment is a normal part of their work. At many centers, including Acibadem hospitals, hidradenitis suppurativa is managed primarily within the dermatology department.

Supporting tests are sometimes used, although none is required in every case:

• Swabs of draining fluid may be taken if the doctor suspects an added bacterial infection, since infection can complicate a flare.
• Blood tests may check for signs of inflammation or screen for related conditions such as diabetes.
• Ultrasound imaging can sometimes help map tunnels under the skin, especially before planning a procedure.
• A skin biopsy (removing a small sample of skin for examination under a microscope) is occasionally done, mainly to rule out other conditions when the picture is unclear.

Diagnosis is often delayed by years because early lesions can look like ordinary boils. If you notice painful lumps that keep returning in the same skin-fold areas, mentioning this pattern clearly to your doctor can help the diagnosis be made sooner.

Treatment options

There is currently no cure for hidradenitis suppurativa, but hidradenitis suppurativa treatment can reduce pain, control flares, limit new tunnels and scarring, and improve quality of life. Treatment is usually tailored to how severe the disease is, and many people use a combination of approaches over time. Care is typically led by a specialist in dermatology, sometimes together with surgeons and other specialists for more advanced disease.

Self-care and general measures

For mild disease, or alongside other treatments, doctors often recommend supportive measures. These may include gentle skin care with non-irritating washes, wearing loose-fitting clothing to reduce friction, using warm compresses on tender lumps, and applying absorbent dressings to draining areas. Quitting smoking and, when relevant, gradual weight loss are two lifestyle changes most consistently associated with a better course, although they do not guarantee improvement. Your doctor may also suggest avoiding shaving directly over inflamed areas.

Medications applied to the skin or taken by mouth

Several medication types are commonly used, depending on severity:

• Topical antibiotics (antibiotic creams or solutions applied to the skin, such as clindamycin) are often used for milder disease to reduce inflammation and bacteria on the skin.
• Oral antibiotics taken for weeks to months are frequently prescribed for moderate disease. In this setting they are used mainly for their anti-inflammatory effect, not only to treat infection.
• Hormonal treatments, such as certain birth control pills or medicines that block male-type hormones, may help some women whose flares follow a hormonal pattern.
• Retinoids (medicines related to vitamin A) are sometimes considered, although they tend to work less well for this condition than for acne.
• Biologic medicines — injectable drugs that block specific parts of the immune system — are approved for moderate to severe hidradenitis suppurativa and can reduce flares in many patients. They require specialist supervision and monitoring.
• Pain relief is an important part of care, and your doctor may recommend appropriate pain medicines during flares.

Response to medication varies from person to person, and it can take time to find the combination that works best for you.

Procedures

Some treatments are performed in the clinic:

• Corticosteroid injections directly into a painful lump can calm inflammation quickly during a flare.
• Incision and drainage — opening an abscess to release pus — can relieve severe pain rapidly, but the lump often returns because the underlying tissue remains, so this is generally a short-term measure.
• Deroofing is a minor surgical procedure in which the doctor removes the top of a tunnel or recurring lesion so it can heal from the base. It is often used for stubborn lesions that keep returning in one spot.
• Laser treatments, including laser hair removal in affected areas, may help selected patients by reducing hair follicles where the disease starts.

Surgery

For severe or long-standing disease with extensive tunnels and scarring, wider surgical removal (excision) of the affected skin may be recommended. Depending on the size of the area, the wound may be closed directly, covered with a skin graft, or left to heal gradually under dressings. Surgery can remove diseased tissue that medicines cannot reverse, but it does not change the underlying tendency, so new lesions can still appear elsewhere. Many patients continue medical treatment after surgery to reduce this risk. Decisions about surgery are usually made jointly between the patient, a dermatologist, and a surgeon.

Watchful waiting

For very mild or infrequent symptoms, a doctor may suggest careful monitoring with self-care measures, treating individual flares as they occur. Because the condition can worsen over time in some people, regular follow-up is still sensible so that treatment can be stepped up if the pattern changes.

Living with hidradenitis suppurativa and outlook

Hidradenitis suppurativa is a long-term condition, and its course varies widely. Some people have mild, occasional flares for years; others experience progressive disease with increasing scarring. It is not possible to predict any individual’s course with certainty. In general, earlier diagnosis and consistent treatment are associated with better outcomes, and severe complications are less likely when tunnels and scarring are prevented or treated early.

Day to day, many people find the following helpful, alongside medical care:

• Keeping a simple diary of flares to identify possible triggers, such as friction, heat, or stress.
• Choosing breathable, loose clothing and moisture-wicking fabrics for exercise.
• Having a plan agreed with your doctor for managing flares at home, including dressings and pain relief.
• Attending regular follow-up visits so treatment can be adjusted before disease advances.

The emotional impact of hidradenitis suppurativa is real and well recognized. Chronic pain, drainage, and the location of lesions can lead to embarrassment, anxiety, or low mood. These effects deserve attention in their own right, and telling your care team about them allows support — including counseling where appropriate — to be built into your treatment plan. Patient support groups can also reduce the sense of isolation many people describe.

People with long-standing hidradenitis suppurativa may have a higher likelihood of certain other health conditions, such as metabolic and inflammatory disorders, so general health checks are worthwhile. Rarely, long-standing severe wounds can develop serious complications, which is one more reason for ongoing specialist follow-up rather than managing alone.

Frequently asked questions

What is hidradenitis suppurativa in simple terms?

It is a chronic inflammatory skin condition in which painful lumps and abscesses form repeatedly in skin-fold areas such as the armpits and groin. It starts in blocked hair follicles and involves an overactive immune response. It is not an infection you catch, it is not caused by poor hygiene, and it cannot be spread to other people.

Can hidradenitis suppurativa be cured or heal on its own?

There is currently no known cure, and the condition rarely disappears completely on its own, although symptoms may quiet down for long periods in some people. Treatment can often control flares, reduce pain, and slow or prevent progression to more severe stages. Some individuals notice improvement after menopause or with lifestyle changes such as stopping smoking, but this varies and cannot be promised.

How serious is hidradenitis suppurativa?

Severity ranges widely. Mild disease may involve occasional lumps that heal between flares, while severe disease can cause constant drainage, extensive scarring, and restricted movement in affected areas. Even mild disease can significantly affect quality of life because of pain and the sensitive locations involved. Early treatment is generally aimed at preventing the condition from advancing to more severe stages.

What triggers hidradenitis suppurativa flares?

Common reported triggers include friction from tight clothing, heat and sweating, hormonal changes such as menstrual periods, stress, and smoking. Triggers differ from person to person, and identifying yours — for example by keeping a brief symptom diary — can help you and your doctor manage the condition. Triggers influence flares but do not cause the underlying disease.

Is hidradenitis suppurativa the same as boils or acne?

No, although it can look similar at first. Ordinary boils are usually one-time bacterial infections that heal after drainage, and acne mainly affects the face, chest, and back. Hidradenitis suppurativa causes lumps that keep returning in skin-fold areas and can form tunnels and scars over time. Because of this overlap, the diagnosis is often delayed, so describing the recurring pattern to your doctor is important.

What is the recovery like after hidradenitis suppurativa surgery?

Recovery depends on the type and extent of the procedure. Minor procedures such as deroofing usually heal within a few weeks with dressing care, while larger excisions may take longer, particularly if the wound is left to heal gradually or a skin graft is used. Surgery removes diseased tissue in the treated area, but new lesions can still develop elsewhere, so ongoing medical treatment and follow-up are often recommended afterward.

Which doctor treats hidradenitis suppurativa?

A dermatologist — a doctor specializing in skin conditions — usually leads diagnosis and treatment. For advanced disease, care may also involve surgeons and, where needed, other specialists such as those managing pain or related conditions. In hospital settings such as Acibadem, this condition falls under the dermatology department, which coordinates with other specialties when combined care is needed.

When to see a doctor

See a doctor if you have painful lumps that keep returning in the armpits, groin, buttocks, inner thighs, or under the breasts, especially if they drain fluid or appear on both sides of the body. Early evaluation matters, because treatment is generally more effective before tunnels and scarring develop.

Seek medical attention promptly if you notice any of the following warning signs:

• Fever or chills together with a painful, swollen skin lesion, which may signal a spreading infection.
• Rapidly worsening redness, swelling, or warmth spreading beyond the original lump.
• Severe pain that is not controlled by your usual measures or pain medicines.
• Heavy or foul-smelling drainage that is new or clearly worse than usual.
• A wound or ulcer that will not heal, or a long-standing lesion that changes in appearance, bleeds, or grows.
• Signs of feeling generally unwell, such as confusion, dizziness, or a racing heartbeat alongside a skin flare, which need urgent assessment.

Even without these urgent signs, it is reasonable to ask for a referral to a skin specialist if recurring lumps are affecting your comfort, movement, sleep, or emotional well-being. A confirmed diagnosis and a clear treatment plan are the most reliable first steps toward keeping hidradenitis suppurativa under control.