Recurrent Perianal Cuts: 7 Causes from Fissures to STIs and When to Seek Care

Recurrent perianal cuts/fissures warrant systematic evaluation. Common etiologies:

1. Anal fissure: Trauma from hard/large stool or chronic diarrhea. Sharp pain + bright red blood on paper. Chronic → sentinel pile, hypertrophic papilla.
2. Hemorrhoids: Internal (painless bleeding, prolapse) or external (thrombosis → acute pain, skin tags).
3. Skin tags: Residual from prior thrombosis/fissure; usually asymptomatic unless irritated.
4. Perianal abscess/fistula: Infected anal gland → fluctuant abscess → chronic fistula (drainage, recurrence).
5. Crohn’s disease: Perianal fistulas, fissures, tags, stenosis—often first manifestation.
6. STIs: HSV (clustered vesicles/ulcers), syphilis (chancre), LGV, HPV (condyloma).
7. Trauma/dermatoses: Aggressive wiping, contact dermatitis, psoriasis, lichen sclerosus.

Red Flags for Urgent Evaluation

• Pus, spreading erythema, fever (abscess).
• Unintentional weight loss, nocturnal diarrhea (Crohn’s).
• Multiple partners, new partner (STI screen).

Diagnosis: exam ± anoscopy, swabs (HSV, GC/CT), biopsy if atypical. Treatment targets underlying cause. Self-treatment with OTC creams delays diagnosis.