Hidradenitis Suppurativa - Acute Flare

Key Points

• Recurrent painful nodules, abscesses, tunnels, and scars in intertriginous areas suggest hidradenitis suppurativa.
• HS is an inflammatory follicular disorder and should not be managed as repeated simple bacterial abscesses.
• Incision and drainage can relieve a tense abscess but has high recurrence when used as definitive treatment.
• Topical clindamycin and oral tetracycline-class therapy are common treatments for limited and more extensive inflammatory disease.
• Systemic toxicity or rapidly progressive perineal pain requires evaluation for deep infection or Fournier gangrene.
• Long-term dermatology treatment can prevent progression and reduce scarring.

Algorithm

1. Confirm a recurrent intertriginous pattern and examine for nodules, abscesses, tunnels, and scars.
2. Assess for systemic illness or rapidly progressive infection that would change the diagnosis.
3. Treat pain and begin gentle local skin care.
4. Drain only a clearly fluctuant collection requiring immediate decompression.
5. Use topical or oral anti-inflammatory antimicrobial therapy according to severity and prior treatment.
6. Culture only when secondary infection or treatment failure is clinically relevant.
7. Arrange dermatology follow-up for biologic, hormonal, procedural, or surgical disease-modifying options.

Clinical Synopsis & Reasoning

Hidradenitis suppurativa is a chronic inflammatory follicular disease affecting intertriginous regions such as the axillae, groin, inframammary folds, buttocks, and perineum. Painful nodules, abscesses, draining tunnels, double-ended comedones, and characteristic scarring distinguish it from isolated bacterial furuncles. Recurrent lesions in the same areas are a major diagnostic clue. Severity is often described with Hurley staging, but an emergency encounter should also document current pain, drainage, systemic symptoms, and whether there is a discrete fluctuant collection.

Most HS inflammation is not caused by an acute invasive bacterial infection, even though secondary infection can occur. Fever, rapidly spreading erythema, crepitus, toxic appearance, or pain far beyond the visible disease should prompt evaluation for cellulitis, Fournier gangrene, or another deep infection. Perianal disease can overlap with Crohn disease. Obesity, smoking, metabolic disease, inflammatory bowel disease, polycystic ovary syndrome, and depression are common associations and influence long-term management.

The emergency goal is control of pain and acute inflammation while avoiding interventions that worsen scarring without changing the disease course. A simple incision and drainage may provide temporary relief from a tense abscess, but recurrence is common because the underlying follicular disease and tunnels remain. Repeated routine drainage should not substitute for dermatology-directed medical and surgical treatment.

Treatment Strategy & Disposition

Provide analgesia and gentle local care. Warm compresses and antiseptic or antimicrobial washes can be useful adjuncts. Topical clindamycin can be used in limited superficial disease, while oral tetracycline-class therapy is commonly used for more extensive inflammatory flares because of both antimicrobial and anti-inflammatory effects. More severe or recurrent disease may require combination antibiotics, hormonal therapy, biologics, deroofing, laser treatment, or excisional surgery under specialist care.

Drain a clearly fluctuant, painful abscess when immediate decompression is needed, but explain that recurrence is expected if this is the only treatment. Intralesional corticosteroid can rapidly reduce inflammation in selected nodules when performed by clinicians familiar with the technique. Do not prescribe broad-spectrum antibiotics solely because lesions drain chronically. Culture is most useful when there is unusual purulence, treatment failure, systemic infection, or concern for resistant secondary infection.

Arrange longitudinal dermatology care after an acute visit. Current AAD resources emphasize individualized topical, systemic, biologic, and procedural therapy, and treatment options continue to evolve. Address smoking cessation and weight management without implying that HS is caused by poor hygiene. Screen for depression and severe quality-of-life burden when appropriate.

Epidemiology / Risk Factors

• HS commonly begins after puberty and may persist for decades.
• Smoking and obesity are strongly associated with more severe disease but are not required for diagnosis.
• Women are affected more often overall, although anatomic patterns differ by sex.
• Diagnostic delay is common because recurrent lesions are mistaken for isolated boils.

Investigations

Adjuncts

Pharmacology

Prognosis / Complications

• Early disease-directed treatment can reduce flares, tunnel formation, and permanent scarring.
• Simple drainage alone has a high rate of recurrence.
• Severe disease can cause chronic pain, mobility limitations, sexual dysfunction, and major psychosocial burden.
• Modern biologic and procedural therapies offer meaningful control for many patients with moderate or severe disease.

Patient Education / Counseling

• Explain that HS is a chronic inflammatory condition and is not contagious.
• Recommend gentle skin care and avoidance of friction rather than harsh scrubbing.
• Discuss smoking cessation and weight management as potentially helpful modifiers without blaming the patient.
• Provide return precautions for fever, rapidly spreading redness, crepitus, severe perineal pain, or systemic illness.
• Emphasize dermatology follow-up because acute drainage alone does not prevent recurrence.

Notes

A recurring pattern in the same axillary, groin, inframammary, buttock, or perineal locations should move the diagnosis away from isolated abscesses. Look for old scars and paired comedones, which often reveal the chronic disease even when only one lesion is acutely painful.

The acute-care clinician can make a major difference by naming the disease, treating pain, avoiding unnecessary repeated drainage, and connecting the patient with longitudinal dermatology care.

References

1. American Academy of Dermatology: Hidradenitis Suppurativa Diagnosis and Treatment — Link
2. American Academy of Dermatology: Hidradenitis Suppurativa Self-Care — Link