What Is Hidradenitis Suppurativa? Painful Skin Lumps, Scarring, and Treatment

Hidradenitis suppurativa is a long-term inflammatory skin condition that causes painful lumps, tunnels under the skin, drainage, and scarring. It most often affects areas where skin rubs together, such as the armpits, groin, buttocks, and under the breasts.

Overview

Hidradenitis suppurativa is a chronic inflammatory skin disease that affects hair follicles in areas where skin rubs together. It often causes deep, tender lumps that may break open, drain fluid with an odor, and heal slowly. Over time, repeated inflammation can lead to thick scars and tunnel-like passages under the skin, sometimes called sinus tracts.

The condition most often develops after puberty and is commonly found in the armpits, groin, inner thighs, buttocks, and under the breasts. Some people have mild symptoms with occasional flare-ups, while others have more widespread or persistent disease. The course can be unpredictable, with periods of improvement followed by recurrence.

Although hidradenitis suppurativa can be physically uncomfortable and emotionally distressing, it is a recognized medical condition with established treatment options. It is not contagious, and it does not happen because a person is unclean. Early evaluation by a dermatologist can help clarify the diagnosis and guide treatment before scarring becomes more severe.

Symptoms of Hidradenitis Suppurativa

Symptoms can vary from person to person, but the condition usually begins with one or more painful bumps under the skin. These may look like boils or acne-like nodules and often recur in the same places. Lesions may last for days to weeks and can become increasingly uncomfortable, especially when walking, exercising, or wearing tight clothing.

As inflammation continues, some lumps may rupture and release pus or blood-stained fluid. Repeated episodes may lead to thickened skin, rope-like scars, and interconnected tunnels beneath the skin surface. Flares can affect daily activities, sleep, work, and self-confidence.

Common signs and symptoms include:

• Painful, deep lumps in skin folds
• Repeated flare-ups in the same area
• Blackhead-like spots in paired openings
• Drainage of pus, fluid, or blood
• Unpleasant odor from draining lesions
• Scarring, skin thickening, or tunnels under the skin

Some people may also notice itching, burning, or warmth in an area before a new lump appears. Because the symptoms can resemble other skin problems, hidradenitis suppurativa is sometimes mistaken for recurrent infection, ingrown hairs, or severe acne.

Causes and Risk Factors

The exact cause of hidradenitis suppurativa is not fully understood, but it is believed to begin with blockage and inflammation of hair follicles. This triggers an immune response in the surrounding skin. Bacteria may play a role in secondary infection in some lesions, but hidradenitis suppurativa itself is not considered primarily an infection, which is why it can continue even with careful washing.

Several factors are associated with a higher risk of developing the condition or having more severe symptoms. Family history is common, suggesting a genetic component in some people. Hormonal influences may also contribute, as symptoms often start after puberty and may change around the menstrual cycle in some women.

Risk factors and associated factors may include:

• Family history of hidradenitis suppurativa
• Smoking
• Overweight or obesity
• Friction and sweating in skin folds
• Female sex
• Other inflammatory conditions, such as Crohn's disease in some patients

Importantly, hidradenitis suppurativa is not caused by poor hygiene, deodorant use alone, or shaving alone. These factors may irritate the skin in some people, but they do not explain the underlying disease process.

How Hidradenitis Suppurativa Is Diagnosed

Diagnosis is usually based on a medical history and skin examination. A doctor looks at where the lesions occur, whether they recur, and whether there are signs such as drainage, scarring, or tunnels under the skin. There is no single blood test that confirms hidradenitis suppurativa.

Because many skin conditions can look similar, a clinician may consider other causes of boils or nodules, including infections, cysts, folliculitis, or acne. In some cases, samples of drainage may be tested if infection is suspected, especially when symptoms are severe or not improving as expected.

Doctors may also assess the stage and extent of disease to guide treatment choices. This includes noting how many areas are involved, whether there are isolated nodules or widespread tunnels and scarring, and how much the condition affects comfort and daily life. Identifying the disease early is helpful because prompt treatment can reduce ongoing inflammation and skin damage.

Treatment Options

Treatment depends on symptom severity, the extent of skin involvement, and how often flare-ups occur. The main goals are to reduce inflammation, ease pain, control drainage, prevent new lesions, and limit scarring. Most people need a long-term management plan rather than a one-time treatment.

For milder disease, treatment may include medicated washes, topical medicines, and close monitoring of triggers. Oral antibiotics may be used for their anti-inflammatory effect as well as for infection when present. In some cases, hormonal treatment, retinoid medicines, or biologic therapy may be considered under specialist care. If a painful abscess needs urgent relief, a doctor may drain it, but simple drainage alone does not usually prevent recurrence.

When tunnels, extensive scarring, or persistent lesions are present, procedural treatment may be recommended. This can include unroofing of tunnels, laser-based approaches, or surgical removal of affected skin. Depending on the pattern of disease, some patients may benefit from specialist dermatology care and, for more advanced disease, surgical treatment planned by a multidisciplinary team.

Pain management and wound care are also important parts of treatment. Dressings may help absorb drainage and protect clothing, while tailored skin-care advice can reduce irritation. In complex cases, evaluation may involve related specialties, especially if there are overlapping inflammatory disorders or concerns about healing.

Prevention and Self-care

Although hidradenitis suppurativa cannot always be prevented, self-care can help reduce irritation and support medical treatment. Gentle daily skin care is usually recommended. This may include using non-irritating cleansers, avoiding aggressive scrubbing, and choosing loose, breathable clothing that reduces friction in affected areas.

Smoking cessation is strongly encouraged, as smoking is linked with worse disease activity in many people. Weight management may also be helpful for some patients by reducing skin friction and inflammation. These steps do not cure the condition, but they may improve control and make flare-ups less frequent or less severe.

Helpful self-care measures may include:

• Keeping affected skin clean and dry with gentle products
• Avoiding squeezing or picking lesions
• Choosing loose-fitting clothes and underwear
• Using absorbent dressings if drainage is present
• Discussing smoking cessation support with a doctor
• Seeking advice about weight management if appropriate

People with recurrent disease may also find it useful to track flare patterns, including menstrual timing, stress, heat, friction, or other personal triggers. Near the end of the care pathway, some international patients may seek evaluation at centers such as Acibadem International, where multidisciplinary specialists in JCI-accredited hospitals diagnose and treat hidradenitis suppurativa.

When to See a Doctor

A person should see a doctor if painful lumps keep coming back, lesions are slow to heal, or there is drainage, odor, or increasing scarring. Medical review is especially important when symptoms interfere with walking, sitting, sleep, work, or emotional well-being. Early treatment can make a meaningful difference.

Prompt assessment is also important if there are signs of significant infection, such as rapidly spreading redness, fever, or severe worsening pain. A doctor can determine whether urgent treatment is needed and whether another skin condition could be involved.

Long-term follow-up is often useful because hidradenitis suppurativa tends to fluctuate over time. A dermatologist can adjust treatment as symptoms change and can discuss whether advanced options, including reconstructive surgery, may help in areas with extensive scarring or tissue damage.

Frequently asked questions

Is hidradenitis suppurativa contagious?

No. Hidradenitis suppurativa is not contagious and cannot be passed from person to person through touch or shared items. It is an inflammatory skin condition, not a hygiene problem.

Is hidradenitis suppurativa the same as acne?

No, although it can resemble acne at first. Hidradenitis suppurativa usually affects skin folds and tends to cause deeper painful lumps, drainage, tunnels, and scarring.

Can hidradenitis suppurativa be cured?

There is no single cure that works for everyone, but many treatments can help control symptoms and reduce flare-ups. Early and consistent care may limit scarring and improve quality of life.

Does poor hygiene cause hidradenitis suppurativa?

No. Poor hygiene does not cause hidradenitis suppurativa. Gentle skin care can support treatment, but the condition develops because of inflammation involving hair follicles and the immune system.

What makes hidradenitis suppurativa worse?

Triggers vary, but friction, sweating, smoking, and excess weight may worsen symptoms in some people. Stress or hormonal changes may also influence flare-ups for certain patients.

When should someone seek medical advice for hidradenitis suppurativa?

Medical advice is recommended when painful lumps recur, drainage or odor develops, or scarring starts to appear. A doctor should also be consulted if symptoms are severe, spreading, or affecting daily life.

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.