Hidradenitis Suppurativa: The Painful Skin Disease Often Mistaken for Ordinary Boils—Until the Scars Become Permanent

It often begins with something so ordinary that most people barely recognize it as a warning.

A small lump beneath the armpit.

A painful bump near the groin.

A swollen area on the inner thigh that feels like an ingrown hair.

At first, the explanation seems obvious.

Perhaps it is a pimple.

Perhaps shaving irritated the skin.

Perhaps it is just another boil that will disappear in a few days.

But the lump doesn't always go away.

Sometimes it grows larger, becoming painful enough to make walking, raising an arm, or wearing clothing uncomfortable.

Sometimes it bursts and releases pus or blood.

It slowly heals.

Then, weeks or months later, another lump appears in almost the same location.

The cycle continues.

What appears to be a series of unrelated skin infections may actually be hidradenitis suppurativa (HS), a chronic inflammatory disease that can cause severe pain, recurring abscesses, persistent drainage, and permanent scarring.

The condition is also called acne inversa, although it is not simply a form of ordinary acne.

Unlike an occasional infected hair follicle, HS involves a continuing inflammatory process that develops around hair follicles and can eventually damage deeper layers of skin.

In more advanced cases, narrow channels form beneath the surface, connecting areas of inflammation. These channels, known as tunnels or sinus tracts, can repeatedly drain fluid and become difficult to heal.

And one of the cruelest aspects of the disease is that people may spend years being told they simply have recurring boils.

Others hesitate to seek medical help because the affected areas are intimate or because they fear being judged for their hygiene.

Yet HS is not contagious, and it is not caused by being dirty.

It is a recognized medical condition involving abnormal inflammation, genetic susceptibility, hormonal influences, and other contributing factors.

A major development came on October 20, 2026, when the American Academy of Dermatology and the Hidradenitis Suppurativa Foundation released their first joint clinical guidelines for managing the disease.

The recommendations reflect important advances in treatment, particularly medications that target specific inflammatory pathways.

For people experiencing recurring painful lumps, the message is important.

What looks like an ordinary boil may not be ordinary at all.

And recognizing the pattern early could help prevent years of unnecessary suffering.

What Is Hidradenitis Suppurativa?

Hidradenitis suppurativa is a chronic inflammatory skin condition that develops around hair follicles, especially in areas where skin touches or rubs against skin.

It may cause tender nodules, boil-like swellings, abscesses, draining wounds, and scarring.

The disease usually develops after puberty, although it can begin at different ages.

Some people experience occasional flare-ups involving only one area.

Others develop recurring inflammation at multiple locations, with symptoms that significantly affect everyday life.

HS is not simply an infection.

Bacteria can sometimes contribute to inflammation or cause secondary infections, but abnormal immune activity and changes around hair follicles are central to the condition.

The U.S. National Institutes of Health identifies HS as a noncontagious inflammatory disease whose exact cause remains incompletely understood.

How Common Is HS?

The October 2026 clinical guidelines estimate that hidradenitis suppurativa affects approximately 0.7%–1.5% of the global population.

That makes it far from an exceptionally rare disease.

However, estimates vary between studies, and underdiagnosis remains a major concern.

The condition is often confused with acne, bacterial infections, and ingrown hairs, meaning some people may live with symptoms for years before receiving an accurate diagnosis.

The Early Warning Signs That Are Easy to Miss

The first symptoms of HS may be subtle.

A person may notice a small lump that feels unusually deep beneath the skin.

Unlike a typical surface pimple, it may not have a visible whitehead.

The area can be tender, warm, or swollen.

Some people experience itching, burning, discomfort, or a tingling sensation before a new lesion becomes visible.

The most important clue is often recurrence.

Seven Signs That a Recurring Boil Could Be HS

Deep, painful lumps

Tender bumps develop beneath the skin and may persist longer than ordinary pimples.

Lumps that repeatedly return

A similar painful swelling appears again in the same area or nearby.

Abscesses that rupture or drain

Inflamed lesions may release pus, blood, or other fluid, sometimes with an unpleasant odor.

Wounds that heal slowly

Some areas remain inflamed for weeks or repeatedly reopen.

Scars and thickened skin

Repeated inflammation leaves raised, depressed, or rope-like scars.

Tunnels beneath the skin

Persistent inflammation may form interconnected channels that drain through several openings.

Paired blackhead-like spots

Some patients develop characteristic double-ended comedones, sometimes called double blackheads.

Not everyone develops every symptom.

A person can have HS without tunnels or extensive scars, especially during the early stages.

This is why waiting until severe damage appears can delay appropriate care.

Where Does Hidradenitis Suppurativa Usually Appear?

HS most commonly occurs in areas where friction, moisture, and skin folds are present.

Typical locations include the armpits, groin, inner thighs, buttocks, and beneath the breasts.

It may also occur around the anus, along the waistline, or in less typical areas such as the back of the neck.

The location alone cannot establish a diagnosis.

For example, lumps in the groin could result from ordinary folliculitis, an infected cyst, a swollen lymph node, or other medical conditions.

But when lesions repeatedly return in characteristic areas, HS becomes an important possibility.

What Actually Causes HS? The Problem Begins Beneath the Skin

One of the most persistent misconceptions about hidradenitis suppurativa is that it develops because sweat glands become dirty or infected.

The modern understanding is more complex.

Although the name refers to inflammation of sweat glands, researchers now recognize that the disease primarily begins around hair follicles.

These are the small structures in the skin from which hairs grow.

In susceptible individuals, the follicle can become obstructed and inflamed.

The follicular wall may eventually rupture, releasing its contents into nearby tissue.

That rupture can trigger a powerful inflammatory response.

Immune cells accumulate.

The surrounding tissue swells.

Painful nodules or abscesses form.

If inflammation repeatedly affects the same region, the deeper skin structures can become damaged.

Over time, that damage may produce tunnels and scarring.

The Cycle of Inflammation

Hair follicle becomes obstructed

Changes around the follicular opening contribute to blockage and swelling.

Follicle becomes inflamed and may rupture

Follicular contents enter surrounding tissue, amplifying inflammation.

Painful nodules and abscesses develop

The area becomes swollen, tender, and sometimes filled with inflammatory fluid.

Repeated inflammation damages deeper skin

Chronic disease may lead to tunnels, persistent drainage, and scar tissue.

This is a simplified explanation of the process. HS involves a complex interaction among follicular changes, immune activity, bacteria, genetics, and environmental factors.

Why Some People Develop It and Others Don't

There is no single established cause.

Researchers believe that multiple factors contribute, including genetic susceptibility, immune-system regulation, hormones, friction, and environmental influences.

Approximately one-third of people with HS report a family history of the condition, suggesting that inherited susceptibility can be important.

Smoking and obesity are associated with HS and may worsen symptoms, but neither is necessary for someone to develop the disease.

People who have never smoked and are not overweight can still develop hidradenitis suppurativa.

HS is a medical condition, not a reflection of someone's cleanliness, character, or personal worth.

Hidradenitis Suppurativa vs. Ordinary Boils: How Can You Tell the Difference?

This distinction is essential because the two conditions may initially look nearly identical.

An ordinary boil is commonly caused by a bacterial infection involving a hair follicle.

It can form a painful, pus-filled swelling and may occasionally require medical drainage or antibiotics.

HS, however, involves a recurring inflammatory disease.

A person with HS may experience repeated episodes even when there is no single underlying bacterial infection to eliminate.

A single lump cannot reliably distinguish the two.

And recurring boils do not automatically mean HS. Other conditions, including recurrent bacterial infections, can produce similar symptoms.

A clinician needs to consider the appearance, location, history, and pattern of the lesions.

The Hidden Impact: When Skin Disease Begins Controlling Everyday Life

The effects of HS extend far beyond visible skin lesions.

A painful abscess in the armpit can make it difficult to raise an arm.

Inflammation between the thighs can make walking uncomfortable.

Persistent drainage may require frequent dressing changes.

People may worry about staining clothes or developing an unpleasant odor from draining wounds.

Some avoid exercise, swimming, romantic relationships, or social activities because of pain or embarrassment.

Sleep can also become difficult when pressure against an inflamed area causes discomfort.

The Emotional Burden of a Misunderstood Condition

A particularly damaging aspect of HS is the stigma surrounding it.

Because lesions frequently occur in intimate areas, patients may delay seeking care.

Some fear being judged or dismissed.

Others repeatedly receive short courses of treatment for what appears to be an ordinary infection, without recognition of the underlying chronic disease.

The 2026 clinical guidelines emphasize the importance of addressing pain, quality of life, and associated mental-health concerns as part of comprehensive care.

This matters because successful treatment involves more than reducing the number of lumps.

It also means helping people regain comfort, mobility, sleep, confidence, and control over their daily activities.

Can Hidradenitis Suppurativa Be Cured?

At present, there is no established permanent cure for HS.

But that does not mean nothing can be done.

Modern treatments can reduce inflammation, control flare-ups, lessen pain, manage drainage, and help prevent or address structural damage.

Some people achieve prolonged periods of minimal disease activity.

The best treatment depends on the location and severity of lesions, previous therapies, medical history, and individual circumstances.

A dermatologist may combine medications, skin care, and procedures.

The aim is not merely to treat each abscess after it appears.

It is to control the underlying inflammatory disease.

A Major Development in October 2026: New HS Treatment Guidelines

On October 20, 2026, the American Academy of Dermatology and Hidradenitis Suppurativa Foundation published their first joint clinical practice guidelines for the management of HS.

The guideline authors reviewed available evidence and issued 37 recommendations covering medications, procedures, symptom control, and supportive care.

Among the strongest recommendations were several biologic medications for moderate-to-severe disease.

The guidelines also emphasized regular pain assessment and individualized management rather than requiring every patient to follow the same treatment sequence.

What Treatments Are Available?

These treatments differ greatly in their indications, benefits, availability, and risks.

They are not interchangeable home remedies.

For example, biologic medicines can affect immune function and require appropriate screening and clinical monitoring.

And a simple incision to drain a painful abscess may provide immediate relief without preventing the lesion from returning.

Biologic Medicines Are Changing HS Care

One of the most significant developments in HS treatment is the use of targeted biologic therapies.

These medicines interfere with specific inflammatory pathways involved in the disease.

Examples include adalimumab, secukinumab, and bimekizumab, which have regulatory approvals for appropriate patients with moderate-to-severe HS in major jurisdictions.

The new U.S. professional guidelines also strongly recommend infliximab based on clinical evidence, although its use for HS is off-label in the United States.

These medicines may reduce inflammatory nodules, abscesses, and other manifestations of active disease.

Not every patient requires biologic treatment, and some respond better than others.

The central advance is that doctors increasingly have options aimed at the disease's underlying inflammation rather than repeatedly treating each flare as an isolated infection.

aad.org+2

What Can You Do at Home During a Flare-Up?

Home care can help reduce discomfort, but it cannot replace medical treatment when symptoms are recurring or severe.

For a painful lump, a warm, clean compress may offer temporary relief.

Gentle washing can help keep the area comfortable.

Loose, breathable clothing may reduce friction against inflamed skin.

If a lesion drains, an appropriate nonstick dressing can help protect clothing and absorb fluid.

Avoid squeezing, puncturing, or attempting to drain a deep lump yourself.

Doing so can worsen tissue injury and may introduce infection.

Aggressive scrubbing, harsh exfoliation, and repeated shaving over affected skin can also aggravate irritation.

Some people benefit from smoking cessation or weight management, when relevant, but these measures should not be presented as cures.

And importantly, avoiding every possible trigger does not guarantee that HS will disappear.

It is an inflammatory condition that often requires ongoing medical management.

When Should You See a Dermatologist?

A medical evaluation is particularly important if you experience:

• Painful lumps that repeatedly return in the armpits, groin, inner thighs, buttocks, or beneath the breasts.
• Swellings that take weeks to heal or repeatedly reopen.
• Pus or fluid draining from several nearby openings.
• Scars forming after recurring lumps.
• Significant pain affecting walking, sleep, work, or other daily activities.

A diagnosis is usually based on clinical history and examination.

Doctors look for characteristic lesions, typical locations, and a recurring pattern.

There is no single blood test that confirms HS.

Swabs, imaging, or other investigations may be appropriate when clinicians suspect infection, deeper tunnels, or an alternative diagnosis.

When It May Be Urgent

Seek prompt medical care if a painful skin swelling is accompanied by fever, rapidly spreading redness or discoloration, severe or rapidly worsening pain, significant weakness, or other signs of systemic illness.

People with diabetes, reduced immune function, or serious underlying conditions should be especially cautious about a suspected skin infection.

Not every painful lump is HS, and an acute bacterial infection may require different treatment.

A rapidly worsening abscess should not be ignored while waiting for a routine dermatology appointment.

Does HS Increase the Risk of Other Health Problems?

HS can coexist with other inflammatory and metabolic conditions.

Research has identified associations with obesity, metabolic syndrome, inflammatory bowel disease, certain inflammatory joint conditions, and depression.

This does not mean every person with HS will develop those problems.

Nor does it establish that HS directly causes all of them.

However, clinicians may consider screening for associated conditions depending on a patient's history and symptoms.

Persistent disease can also lead to complications such as scarring, restricted movement, chronic pain, and recurrent wounds.

In rare cases, longstanding severe disease—particularly in certain chronically affected areas—has been associated with squamous cell carcinoma.

This rare but serious complication is one more reason persistent, unusual, or changing wounds should be examined.

Myths vs. Facts About Hidradenitis Suppurativa

Frequently Asked Questions

What is the first sign of hidradenitis suppurativa?

Often, the first sign is a small, painful lump beneath the skin, commonly in an armpit, the groin, or another skin fold. Repeated episodes in similar locations are especially suggestive.

How do I know if a boil is HS?

A single boil does not establish HS. Recurrent painful lumps in characteristic locations, especially with drainage, double blackheads, tunnels, or scarring, warrant evaluation by a dermatologist.

Can HS occur in the groin or private areas?

Yes. The groin and nearby skin folds are common sites. However, genital or groin lumps may have many other causes, so an examination is important.

Is hidradenitis suppurativa an STD?

No. HS is not a sexually transmitted infection and cannot be caught through sexual contact.

Can stress trigger HS flare-ups?

Some people report worsening symptoms during periods of stress, but triggers vary. Stress alone is not considered the underlying cause of the disease.

Does HS always get worse?

No. Its course varies considerably. Some people experience mild, intermittent disease, while others develop persistent inflammation and structural skin damage. Appropriate treatment may reduce disease activity and complications.

Can HS be cured permanently with surgery?

Surgery can remove chronically affected tissue and may provide lasting improvement in treated areas, but it does not guarantee that HS cannot develop elsewhere or recur.

What is the best treatment for HS in 2026?

There is no single best treatment for everyone. Options depend on severity and individual factors, ranging from topical treatments and oral medications to biologics and procedures. Updated 2026 guidelines strongly support several targeted biologic therapies for suitable moderate-to-severe cases.

The Most Important Warning Sign Isn't the First Lump—It's the Pattern

A painful bump beneath the skin is easy to dismiss.

Most people have experienced pimples, ingrown hairs, or occasional boils.

And many of those conditions resolve without lasting consequences.

But hidradenitis suppurativa behaves differently.

A lump appears.

It becomes inflamed.

It heals slowly.

Then another returns.

Over time, the repeated cycle can injure the skin beneath the surface, creating scars and tunnels that may be difficult to reverse.

For some patients, the physical pain becomes only one part of the burden.

There is the uncertainty of the next flare.

The worry about drainage.

The difficulty of explaining the condition to others.

And the frustration of being told repeatedly that an underlying inflammatory disease is simply another infection.

The growing medical understanding of HS is changing that picture.

Dermatologists now have clearer diagnostic approaches, targeted medications, and evidence-based treatment recommendations.

The October 2026 guidelines represent another step toward recognizing HS as a serious inflammatory condition that deserves timely and comprehensive care.

But progress in treatment can only help people who recognize that their symptoms deserve attention.

A recurring painful lump is not proof of HS.

It is a reason to consider the possibility and seek an appropriate diagnosis.

The tragedy of hidradenitis suppurativa is not that every patient inevitably develops severe disease. It is that a treatable inflammatory condition may go unrecognized until repeated episodes have already left permanent damage.

Sometimes the most important step toward protecting the skin is recognizing that the problem isn't an ordinary boil.

It is the fact that the boil keeps coming back.

Medical Sources and Further Reading

• American Academy of Dermatology — New Hidradenitis Suppurativa Guidelines (October 20, 2026). Latest joint professional recommendations.
• Journal of the American Academy of Dermatology — 2026 HS Guidelines. Peer-reviewed clinical guideline, DOI: 10.1016/j.jaad.2026.08.125.
• NIAMS — Hidradenitis Suppurativa. U.S. National Institutes of Health overview of symptoms, causes, and risk factors.
• U.S. FDA — Hidradenitis Suppurativa. Public-health guidance on complications, treatment, and quality of life.
• American Academy of Dermatology — Diagnosis and Treatment. Medication and procedural treatment information.
• NHS — Hidradenitis Suppurativa. Symptoms, diagnosis, and clinical management.
• DermNet — Hidradenitis Suppurativa. Detailed dermatological description and staging.