What Causes Small Bumps on the Vulva?

Small bumps on the vulva can arise from a wide range of causes—some benign and self-limiting, others requiring medical evaluation and treatment. Common non-infectious explanations includeFordyce spots (ectopic sebaceous glands), which appear as painless, flesh-colored or yellowish papules and are entirely normal anatomical variants; vestibular papillomatosis, a harmless condition characterized by symmetric, smooth, filiform projections along the inner labia minora; and folliculitis, often triggered by hair removal, friction, or occlusion, presenting as tender, erythematous pustules around hair follicles.

Infectious etiologies must also be considered. Genital warts—caused by low-risk human papillomavirus (HPV) types 6 and 11—typically manifest as soft, fleshy, cauliflower-like growths that may be solitary or clustered. Herpes simplex virus (HSV) infection can present initially as grouped vesicles or shallow ulcers, often accompanied by pruritus, burning, or systemic symptoms such as fever and lymphadenopathy. Molluscum contagiosum, a poxvirus infection, appears as discrete, umbilicated, pearly papules and is more common in immunocompromised individuals or those with close skin-to-skin contact.

Less common but clinically important considerations include lichen planus (with violaceous, polygonal papules and Wickham striae), lichen sclerosus (characterized by porcelain-white plaques, atrophy, and potential scarring), and, rarely, vulvar intraepithelial neoplasia (VIN) or invasive squamous cell carcinoma—particularly when lesions are persistent, ulcerated, asymmetric, or associated with chronic itching or bleeding. A thorough history—including onset, duration, symptom progression, sexual activity, hygiene practices, and immune status—is essential. Physical examination should assess morphology, distribution, symmetry, and associated signs such as excoriation or pigmentary changes.

Diagnosis relies on clinical assessment, though dermatoscopy, acetic acid application, viral PCR, or biopsy may be indicated depending on suspicion. Patients should be advised against self-treatment or aggressive manipulation of lesions and encouraged to seek timely evaluation by a gynecologist or dermatologist for accurate diagnosis and appropriate management.