Buttock/Perianal Pain: Causes, Red Flags, and When to See a Specialist

Pain in the intergluteal cleft ("butt crack") is not normal and indicates underlying pathology requiring evaluation.

Common Causes

• Pilonidal cyst/sinus: Hair/nidus in natal cleft → infection, abscess, drainage. Common in young adults, hirsute males.
• Perianal abscess/fistula: Anal gland infection → fluctuant mass, fever, drainage.
• Thrombosed external hemorrhoids: Acute painful lump.
• Anal fissure: Sharp pain with bowel movements, bright red blood, sentinel tag.
• Dermatologic: Hidradenitis suppurativa, psoriasis, eczema, contact dermatitis, tinea.
• Coccydynia: Tailbone pain (trauma, prolonged sitting).
• Referred pain: Sacroiliac joint, lumbar spine, prostate, gynecologic conditions.

Red Flags

• Fever, spreading cellulitis.
• Urinary or fecal incontinence.
• Rectal bleeding > spotting.
• Unexplained weight loss.
• History of Crohn's disease, cancer.

Evaluation

• External inspection, digital rectal exam, anoscopy.
• MRI for fistula or pilonidal extent.
• Colonoscopy if >45 or risk factors present.

Don't self-diagnose. Colorectal surgeon or gastroenterologist for definitive management.