HS is more than simple folliculitis. It is chronic inflammation → forming Subcutaneous tunnels (sinus tracts) → an auto-inflammatory disease with irreversible tissue destruction and scarring.The earlier the treatment, the better the outcome. In Asia, prevalence is higher in men than women (opposite of Europe/US).
What is Hidradenitis Suppurativa (HS)?
HS is a chronic inflammatory disease of follicular occlusion in apocrine-bearing areas (axilla, groin, perianal, inframammary, buttocks). Mistaken for "regular boils" or "abscesses," HS actually involves recurrent painful nodules → abscess → sinus tracts → scarring. Lifetime prevalence ~1%, F:M = 3:1, peaks 20-40 years old. Smoking and obesity strongly associated.
Diagnostic Criteria (3 hallmarks)
- Typical lesions: deep painful nodules, abscesses, sinus tracts, scarring
- Typical sites: axillae, groin, inframammary, perianal, buttocks (≥ 2 sites)
- Recurrent / chronic: ≥ 2 episodes within 6 months
Hurley Staging
| Stage | Features | Treatment focus |
|---|---|---|
| Hurley I | Single / few nodules & abscesses; no sinus tracts or scarring | Topical clindamycin, oral tetracycline, lifestyle |
| Hurley II | Recurrent abscesses with sinus tracts and scarring; widely separated lesions | Oral antibiotics (combinations), biologics (Adalimumab / Secukinumab), surgical deroofing |
| Hurley III | Diffuse involvement, multiple interconnected sinus tracts, extensive scarring | Biologics + wide excision surgery |
Treatment Ladder
Mild (Hurley I) / All stages baseline
- Lifestyle: smoking cessation, weight loss (BMI < 30 strongly correlates with improvement), avoid mechanical friction (loose clothing), gentle washing
- Topical clindamycin 1% solution BID for active lesions
- Topical resorcinol 15%: dissolves keratin plugs, applied to active nodules
- Antiseptic washes: chlorhexidine, benzoyl peroxide
- Intralesional triamcinolone: 5-10 mg/mL for acute painful nodules — rapid relief
Moderate (Hurley II)
- Oral antibiotics: tetracycline (doxycycline 100 mg BID × 3-6 mo) or clindamycin 300 mg BID + rifampin 300 mg BID × 10 weeks (gold standard combination)
- Hormonal therapy: COCP (cyproterone-containing) or spironolactone 50-150 mg/d for women
- Acitretin / isotretinoin: limited data; isotretinoin disappointing for HS specifically
Moderate-severe (Hurley II-III) — Biologics
| Drug | Mechanism | Dose | Phase-3 efficacy |
|---|---|---|---|
| Adalimumab (Humira) | Anti-TNFα | 40 mg weekly (note: 2024 update; was bi-weekly previously) | HiSCR50 wk 12: ~ 50% (PIONEER I/II); 41.8% vs 26.0% placebo |
| Secukinumab (Cosentyx) | Anti-IL-17A | SC 300 mg weekly × 5 → q2w or q4w | HiSCR wk 16: 41.8-45.0% (SUNSHINE / SUNRISE 2023) |
| Bimekizumab (off-label / pipeline) | Anti-IL-17A & F | SC q4w | HiSCR wk 16: ~ 50% (BE-HEARD) |
| Infliximab (off-label) | Anti-TNFα IV | 5 mg/kg IV q8w | Open-label data supportive |
Surgical options
- Deroofing: removes the roof of sinus tracts and abscesses, leaves base for healing — preferred for limited disease
- Wide local excision: removes all involved tissue with margins; for severe Hurley III, may require flap closure
- CO₂ / Er:YAG laser: laser deroofing with reduced bleeding
- Hair removal laser (Nd:YAG, Alexandrite, IPL): reduces follicular load, prevents new lesions
Comorbidities
- Obesity, metabolic syndrome (HS is independently associated)
- Cardiovascular disease (1.5-2× elevated)
- Inflammatory bowel disease (Crohn's especially, 5-8% HS patients)
- Spondyloarthritis
- Depression / anxiety / suicide risk markedly elevated — QoL severely impacted
- Squamous cell carcinoma in long-standing HS scars (rare but reported)
Summary
HS is often misdiagnosed as "boils" for years before correct identification. Average diagnostic delay is 7-10 years. Early recognition + lifestyle changes + appropriate medical / surgical approach can significantly improve outcomes. Biologics (Adalimumab, Secukinumab) have transformed moderate-to-severe HS treatment — patients who previously suffered through years of recurrent abscesses now achieve substantial control. If you have recurrent painful "boils" in 2+ apocrine areas, see a dermatologist for HS evaluation.