Early Warning Signs of Hidradenitis Suppurativa
Recognising HS early can significantly reduce the time to diagnosis and the severity of the condition. Here are the 7 signs that should prompt a conversation with a dermatologist.
Why Early Recognition Matters
Hidradenitis Suppurativa is a chronic inflammatory skin condition that affects approximately 1 in 100 people. Despite its prevalence, it remains one of the most misdiagnosed conditions in dermatology. The average patient waits 7 to 10 years from their first symptom to receiving a correct diagnosis. Early recognition and treatment can prevent the formation of sinus tracts, reduce scarring, and significantly improve quality of life.
About the illustrations: The images accompanying each warning sign are AI-generated educational diagrams, not clinical photographs. They are designed to illustrate anatomical concepts for learning purposes only. Individual presentations of HS vary widely. Always seek evaluation from a board-certified dermatologist for any skin concern.
The 7 Early Warning Signs
These signs do not guarantee an HS diagnosis, but their presence, especially in combination, warrants evaluation by a dermatologist.
Deep, Painful Lumps Under the Skin
One of the earliest and most distinctive signs of HS is the appearance of deep, tender nodules beneath the skin surface. Unlike ordinary pimples, which sit at the surface, these lumps are rooted deep in the dermis and feel hard or rubbery to the touch. They are often exquisitely painful, sometimes described as feeling like a bruise or a deep toothache in the skin.
What to watch for:
Lumps that feel deep and painful even before they become visible at the surface, particularly in the armpits, groin, or under the breasts.
Lesions in Specific Body Fold Areas
HS has a very characteristic distribution. It almost exclusively affects areas where skin folds against skin or where apocrine sweat glands are concentrated. The most common sites are the armpits, groin, inner thighs, buttocks, and under the breasts in women. Lesions on the face, scalp, or limbs are much less typical of HS.
What to watch for:
Recurring painful bumps specifically in body fold areas, particularly if they appear in more than one location simultaneously.
Recurring Lesions in the Same Spot
Perhaps the most important early warning sign of HS is recurrence. A single boil or abscess can happen to anyone. But when painful lumps return repeatedly to the exact same location, this is a strong indicator of HS. Many patients describe a predictable cycle: a lump appears, grows painful, may drain, seems to heal, and then returns weeks or months later in the same spot.
What to watch for:
Any painful skin lesion that has returned to the same location two or more times within six months.
Drainage of Pus or Fluid
HS lesions frequently rupture and drain a mixture of pus, blood, and malodorous fluid. This drainage can be spontaneous or triggered by pressure. The fluid may be thick and yellowish or thin and bloody. Many patients report that the area feels temporarily better after drainage but that the underlying lump does not fully resolve.
What to watch for:
Recurring drainage from the same skin area, particularly if the underlying lump persists after drainage or returns quickly.
Blackheads in Pairs or Clusters
A unique early sign of HS is the appearance of double-headed blackheads, also called tombstone comedones. These are enlarged pores or blackheads that appear in pairs or small clusters in the affected skin areas. They are most commonly seen in the armpits and groin. Unlike ordinary blackheads, these are often surrounded by slightly thickened skin.
What to watch for:
Paired or clustered blackheads in the armpits, groin, or inner thighs, especially if accompanied by any tenderness or redness.
Rope-Like Scars or Skin Thickening
As HS progresses, the repeated cycles of inflammation and healing leave behind characteristic scarring. This often appears as rope-like, cord-like, or bridge-like scars that connect previous lesion sites. The skin in affected areas may also become thickened, darker, or have a pitted texture. These changes are a sign that the condition has been active for some time.
What to watch for:
Any unusual scarring, skin thickening, or changes in skin texture in the armpits, groin, or other typical HS locations.
Flares Triggered by Specific Factors
Many people with HS notice that their lesions worsen at predictable times: before menstrual periods, during hot or humid weather, after wearing tight clothing, following periods of stress, or after consuming certain foods. These triggers reflect the inflammatory nature of HS and can be an important clue that the condition is systemic rather than a simple localised infection.
What to watch for:
A consistent pattern of skin flares linked to hormonal cycles, heat, stress, or dietary factors in the typical HS body areas.
If You Recognise These Signs: Next Steps
Recognising the signs is the first step. Here is how to move toward getting an accurate diagnosis.
Document Your Symptoms
Keep a simple log of when lesions appear, where they are located, how long they last, and any possible triggers. This information is invaluable when speaking to a dermatologist.
Photograph the Affected Areas
Take photos of lesions at different stages: when they first appear, at their most inflamed, and after they drain or heal. This visual record helps dermatologists assess the pattern and severity.
Request a Dermatology Referral
Ask your primary care doctor for a referral to a board-certified dermatologist, ideally one with experience in HS. Be specific: tell them you are concerned about hidradenitis suppurativa.
Bring Your Documentation
Bring your symptom log and photos to your dermatology appointment. Mention how long you have had symptoms, which areas are affected, and whether lesions recur in the same locations.
You Deserve an Accurate Diagnosis
If you recognise these warning signs in yourself or someone you care for, please do not wait. Early intervention can make a meaningful difference in the long-term course of HS.
Continue Your HS Education
Medical References
- [1]Jemec GBE. Hidradenitis suppurativa. N Engl J Med. 2012;366(2):158-164. PubMed
- [2]Goldburg SR, Strober BE, Payette MJ. Hidradenitis suppurativa: epidemiology, clinical presentation, and pathogenesis. J Am Acad Dermatol. 2020;82(5):1045-1058. PubMed
- [3]Kokolakis G, et al. Delayed diagnosis of hidradenitis suppurativa and its effect on patients and healthcare system. Dermatology. 2020;236(5):421-430. PubMed
- [4]Alikhan A, et al. North American clinical management guidelines for hidradenitis suppurativa. J Am Acad Dermatol. 2019;81(1):76-90. PubMed