Penile Bumps: Types, Diagnosis and Treatment

If you have just noticed a bump and want to work out what it might be, start with the symptom guide to bumps on the penis, which includes an identification table and when to seek care. This page explains each cause and its treatment.

Normal variants

These are part of normal anatomy. They are not infections, cannot be passed on and do not become cancer.

Infections

Genital warts (HPV)

Caused by low-risk types of human papillomavirus, mainly types 6 and 11. Warts are skin-colored, flat or cauliflower-like, and may appear weeks to months after contact. Genital warts are treated with patient-applied creams (such as imiquimod or podofilox) or clinic treatments (freezing with liquid nitrogen, trichloroacetic acid, or surgical or laser removal). Treatment clears visible warts but the virus can stay in the skin, so recurrence is common in the first months.

Genital herpes

Herpes simplex virus (HSV-1 or HSV-2) causes groups of painful blisters that burst into shallow sores and crust over. The first outbreak can include fever, swollen groin glands and painful urination. Diagnosis is by PCR swab of a fresh sore. Antiviral tablets shorten outbreaks, and daily suppressive therapy reduces recurrences and transmission. See genital herpes.

Molluscum contagiosum

A poxvirus causes firm, pearly, dome-shaped bumps with a central dimple. In adults it is often spread sexually. Bumps usually clear on their own within 6 to 18 months, but freezing, curettage or creams speed clearance and reduce spread. Many molluscum lesions in an adult can be a sign of weakened immunity and prompt an HIV test.

Syphilis

Primary syphilis causes a single painless, firm ulcer (chancre) about 3 weeks after exposure. It heals on its own, but the infection does not. Secondary syphilis can cause a rash and moist warty patches. Diagnosis is by blood test, and penicillin cures it. Syphilis rates have risen sharply in the US over the past decade.

Scabies and other infections

Scabies mites cause intensely itchy papules on the penis and scrotum, typically with burrows on the hands and wrists. It is treated with permethrin cream or oral ivermectin for the person and close contacts. Other causes include folliculitis, candida (yeast) balanitis, and less common STIs such as chancroid and lymphogranuloma venereum.

Inflammatory skin conditions

• Lichen planus: flat-topped, shiny, violet papules, sometimes in a ring on the head of the penis. Treated with steroid creams.
• Lichen sclerosus: white, shiny, thin patches, often in uncircumcised men, which can tighten the foreskin (phimosis) and narrow the urethra. A strong steroid ointment controls it. It slightly raises the risk of penile cancer, so follow-up is needed.
• Psoriasis: on the penis it forms smooth red patches rather than thick scales. Treated with mild steroids or vitamin D creams.
• Balanitis and contact dermatitis: inflammation of the head from yeast, poor hygiene, irritant soaps, latex or diabetes.

Precancer and penile cancer

Penile intraepithelial neoplasia is a precancer that can look like a red velvety patch, a white plaque or a warty area. Penile cancer is rare in the US. It is linked to high-risk HPV, smoking, phimosis and lichen sclerosus, and is less common in men circumcised at birth. Any persistent lesion that bleeds, ulcerates or grows needs a biopsy. Early disease is treated with creams, laser or limited surgery, with good outcomes. See penile cancer.

How penile bumps are diagnosed

1. History: onset, pain, itch, sexual contacts, condom use, shaving, products used and other skin conditions.
2. Examination of the penis, scrotum, groin, anus and mouth, and often the skin elsewhere.
3. Tests when needed: - PCR swab for herpes - blood tests for syphilis and HIV - urine NAAT for chlamydia and gonorrhea - skin scraping for scabies - biopsy for unclear, persistent or suspicious lesions

Applying vinegar (acetowhitening) to look for warts is no longer recommended for diagnosis because it is unreliable.

Prevention

• HPV vaccination protects against the types that cause most genital warts and HPV-linked cancers. It is recommended in the US for everyone at 11 to 12 years and catch-up through age 26, and may be offered up to 45.
• Condoms reduce, but do not eliminate, transmission of herpes, HPV and syphilis, which spread by skin contact.
• Regular STI testing with new partners.
• Daily suppressive antivirals reduce herpes transmission to partners.
• Good hygiene under the foreskin, using water and avoiding harsh soaps.

Frequently asked questions

What are the most common types of bumps on the penis?

The most common are pearly penile papules and Fordyce spots, which are normal, followed by ingrown hairs and folliculitis. Among infections, genital warts and herpes are the most frequent. A clinician can usually tell these apart by appearance.

Can penile bumps go away on their own?

Some do. Folliculitis and ingrown hairs settle in days. Molluscum and some warts clear over months. Herpes outbreaks heal but the virus remains and can recur. Normal variants like pearly papules are permanent but harmless. Syphilis sores heal while the infection progresses, so testing is essential.

How are genital warts on the penis removed?

Options include prescription creams applied at home over several weeks, or clinic treatments such as freezing with liquid nitrogen, acid applications, and surgical or laser removal. Over-the-counter wart products for hands and feet should not be used on genital skin.

Are penile bumps a sign of cancer?

Rarely. Most bumps are normal variants, infections or skin conditions. Penile cancer usually appears as a persistent sore, growth, or red or white patch on the head or foreskin that does not heal. Any such change lasting more than 4 to 6 weeks should be biopsied.