Skin Bumps on Inner Thigh/Groin: Differential Diagnosis

A bump in the groin/inner thigh could be:

• Folliculitis: Red, pustular, tender bumps around hair follicles (Staph). Common with friction, shaving, occlusion.
• Hidradenitis suppurativa: Recurrent, painful nodules/abscesses in apocrine areas (groin, axilla); sinus tracts, scarring.
• Epidermoid cyst: Mobile, dome-shaped, central punctum; cheesy keratin discharge if ruptured.
• Ingrown hair: Papule/pustule at hair exit; trapped hair visible.
• Genital warts (HPV): Flesh-colored, cauliflower-like, painless.
• Herpes simplex (HSV-2): Clustered vesicles on erythematous base → ulcers; prodrome of tingling/burning.
• Lymphadenopathy: Mobile, rubbery nodes from local infection or systemic illness.
• Lipoma: Soft, mobile, non-tender subcutaneous.

Do not squeeze. Warm compresses for folliculitis/cyst. See clinician for: persistent >2 weeks, growing, painful, multiple, systemic symptoms, or STI concern. Diagnosis: exam, swab culture, PCR, biopsy if needed.