Skin & hair

The Years HS Spends Mistaken for Something Else

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People with hidradenitis suppurativa commonly spend years being treated for something else — a boil that keeps 'coming back,' folliculitis, or acne — before anyone recognizes the pattern. This walks through why the misdiagnosis happens so often, what actually distinguishes hidradenitis from its look-alikes, and what changes once the correct diagnosis is finally made.

Last updated: July 2026History

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Why hidradenitis looks like something else at first

Hidradenitis suppurativa causes recurring, painful nodules and abscesses in skin folds — the armpits, groin, under the breasts, and buttocks — that can rupture, drain, and eventually form tunnels and scarring 1. Because a single nodule can look exactly like a boil or an infected cyst, many people are told for years that they simply get boils, or that they have a stubborn case of folliculitis or acne in an unusual place 1.

The clue that separates hidradenitis from a one-off boil is the pattern, not any single lesion. A boil is typically a single, isolated event that clears and does not return to the exact same fold. Hidradenitis repeats in the same handful of locations, often on both sides of the body, and tends to leave behind visible scarring, sinus tracts, or double-headed comedones — features an isolated skin infection does not produce.

How long the diagnosis actually takes

The average delay between symptom onset and correct diagnosis is measured in years rather than months in most published cohorts, largely because the disease is treated symptomatically — drained, given a short course of antibiotics, and considered resolved — rather than recognized as a chronic, recurring condition 1.

Each isolated episode can look, in the moment, exactly like ordinary infected skin, and a clinician who sees a single visit rarely has the full picture a patient carries in memory of what has happened over the preceding years. That gap matters beyond the label itself: a correct diagnosis is what actually changes the treatment being offered, from repeated incision-and-drainage for individual boils to a coordinated plan aimed at the underlying inflammatory disease — the entire reason a diagnosis is worth pursuing rather than an abstract exercise in naming a rash 2.

Acne, folliculitis, and the other frequent stand-ins

Acne is the misdiagnosis that follows hidradenitis into adulthood most often, because both conditions involve inflamed follicles, and hidradenitis nodules in the armpits or groin can be mistaken for unusually located acne cysts. The distinguishing detail is location: acne concentrates on the face, chest, and back, while hidradenitis concentrates in the folds and recurs in the same spots, leaving tunnels and rope-like scarring inflammatory acne does not typically produce.

Recurrent folliculitis and simple boils are the other frequent stand-ins, and the overlap is real enough that a first or second episode is genuinely difficult to tell apart from hidradenitis on appearance alone. What tips the diagnosis is the folliculitis treatment ladder failing to hold: repeated courses of topical or oral antibiotics quiet the visible lesion each time, but new ones keep appearing in the same folds within weeks to months.

Why a single visit — or a single photo — often isn't enough

A single clinic photograph or a quick look at one active lesion often is not enough to separate hidradenitis from its look-alikes, which is part of why the diagnosis is frequently missed at a first or even second visit. What teledermatology limits most here is exactly this pattern-recognition problem: a single image shows one lesion at one moment, not the history of recurrence in the same folds over years that is the actual diagnostic signature.

A dermatologist examining the area in person, and asking about how many times a spot has recurred in that exact location, over how many years, and whether relatives have had similar skin problems, is often what finally surfaces the pattern a series of urgent-care visits for "another boil" had missed.

Why primary care and urgent care miss it too

Primary care and urgent care visits are often structured around treating what is in front of them at that moment, which works against catching a disease whose defining feature is a pattern across separate visits, sometimes years apart and at different clinics. A single encounter for a "boil" that gets drained and treated with antibiotics looks, from inside that visit, exactly like an isolated skin infection resolving as expected.

Asking directly for a dermatology referral after a second or third recurrence in the same fold — rather than a fourth round of the same drainage-and-antibiotics cycle — is often the single step that breaks the pattern and gets hidradenitis actually named. Bringing photos of prior episodes to that referral gives the dermatologist the timeline a single exam cannot show on its own.

What changes once hidradenitis is correctly named

Once hidradenitis is correctly identified, the treatment conversation shifts from repeatedly draining individual lesions to addressing the disease as a whole. Clindamycin for hs and a routine of hs daily care — antiseptic washing done consistently, not only during a flare — are common starting points, chosen because they act on the follicular inflammation driving hidradenitis rather than only whatever bacteria happen to be present in an open lesion.

Reaching the correct diagnosis, even after years of being told it was "just boils," does not mean the disease has been undertreated in some irreversible way — it means the next steps finally target the actual condition. For many people, that reframing is itself a relief after a long stretch of being treated for something that kept coming back despite doing everything asked of them.

When the diagnosis opens the door to stronger treatment

For nodules that keep recurring despite hs oral antibiotics, guidelines describe biologic treatment as the next tier: a large randomized trial found that the biologic adalimumab produced significantly more clinical responses than placebo at twelve weeks in people with moderate-to-severe hidradenitis 3. That option only becomes available once the underlying diagnosis is on record, which is itself a reason a years-long misdiagnosis carries a real cost beyond the discomfort of any single flare.

A dermatologist familiar with hidradenitis can also stage how advanced the disease is and match treatment to that stage — something that is simply not possible while each nodule is still being treated as an unrelated, isolated event. Knowing when to start biologic for hidradenitis only follows from having the correct diagnosis in the first place.

Common questions

Each flare can look, by itself, like an isolated boil or skin infection, and the diagnosis actually depends on recognizing a pattern across years — recurring nodules in the same folds, tunnels, and scarring — that a single visit rarely captures. Published cohorts describe average delays measured in years, largely because the disease keeps being treated episode by episode rather than as one ongoing condition.

A boil is typically a single, isolated event that resolves and does not return to the same exact spot. Hidradenitis recurs repeatedly in the same handful of folds, often on both sides of the body, and over time leaves behind tunnels under the skin and rope-like scarring that an isolated boil does not produce.

A single photo shows one lesion at one moment, not the years-long pattern of recurrence in the same folds that actually distinguishes hidradenitis from a one-off infection. An in-person exam, along with a history of how often and where nodules have recurred, is what usually confirms the diagnosis rather than any single image.

No. Both involve inflamed hair follicles, which is part of why hidradenitis in the armpits or groin gets mistaken for acne, but acne concentrates on the face, chest, and back, while hidradenitis concentrates in skin folds and recurs there, eventually forming tunnels and scarring that typical acne does not.

Asking for a referral to a dermatologist after a second or third recurrence in the same fold, rather than repeating another round of drainage and antibiotics, is often what finally gets hidradenitis correctly named. Bringing photos of earlier episodes helps the dermatologist see a timeline no single visit can show.

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When a recurring "boil" needs a dermatology evaluation

  • —A nodule or abscess that has recurred more than twice in the same fold — armpit, groin, under the breast, or buttock crease
  • —Tunnels, cords, or scarring forming under the skin between episodes
  • —Nodules appearing in the same symmetric locations on both sides of the body
  • —A flare with rapidly spreading redness, warmth, or fever, which can signal a secondary infection needing prompt care

A flare with fast-spreading redness, red streaking, or fever alongside it warrants same-day urgent care or an emergency department rather than another round of home treatment.

This article is general education about a commonly misdiagnosed condition, not a diagnosis itself. Confirming hidradenitis suppurativa — and ruling out other causes of a recurring skin lesion — requires an in-person evaluation by a clinician.

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References

  1. 1.Sabat R, Jemec GBE, Matusiak Ł, et al. (2020). Hidradenitis suppurativa. Nature Reviews Disease Primers. doi:10.1038/s41572-020-0149-1 ✓Definition and clinical presentation of hidradenitis suppurativa as a chronic, recurring follicular disease of skin folds with nodules, abscesses, tunnels, and scarring, and the pattern of repeated symptomatic treatment before a correct diagnosis is reached.
  2. 2.Schünemann HJ, Oxman AD, Brozek J, et al. (2008). Grading quality of evidence and strength of recommendations for diagnostic tests and strategies. BMJ. doi:10.1136/bmj.39500.677199.AEThe principle that a diagnosis only has value through the downstream management decisions it changes, supporting why reaching the correct hidradenitis diagnosis matters beyond simply naming the condition.
  3. 3.Kimball AB, Okun MM, Williams DA, et al. (2016). Two Phase 3 Trials of Adalimumab for Hidradenitis Suppurativa. New England Journal of Medicine. doi:10.1056/NEJMoa1504370PIONEER I and II phase 3 randomized placebo-controlled trials showing weekly adalimumab significantly increases clinical response at week 12 in moderate-to-severe hidradenitis suppurativa, as the treatment tier that opens up once the diagnosis is correctly made.

3 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — citations link their sources. Editorial policy

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