Dark Bumps on the Penis: Possible Causes and Solutions - Dermatology

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I have had a dark-colored bump at the base of my penis for over a year.
It is neither painful nor itchy, and it hasn't increased in number.
I have seen three urologists during this time, and they all said they didn't know what it was; it could be folliculitis or a viral infection.
Could you please have a doctor evaluate it?

Nìmíng, 20~29 year old female. Ask Date: 2018/05/17

Dr. Wu Yuxin reply Dermatology


Medical regulations state that "a physician must personally examine a patient before providing treatment or prescribing medication..." Therefore, online diagnosis is also not permissible.
If you are experiencing significant distress, it is advisable to seek medical attention promptly.

Reply Date: 2018/05/17

More Info


When it comes to dark bumps on the penis, there are several potential causes that should be considered. Given that you have had these bumps for over a year without any pain, itching, or increase in number, it is important to approach the situation with a careful and informed perspective.

1. Folliculitis: One of the possibilities mentioned by the urologists you consulted is folliculitis, which is an inflammation of the hair follicles. This condition can occur due to bacterial infections, irritation, or blockage of the follicles. Typically, folliculitis presents as small red or dark bumps, and while it can be uncomfortable, it usually resolves on its own or with topical treatments.

2. Seborrheic Keratosis: Another benign possibility is seborrheic keratosis, which is a non-cancerous skin growth that can appear as a dark bump. These growths are often harmless and can vary in color from light tan to dark brown or black. They are common in adults and usually do not require treatment unless they become bothersome.

3. Pearly Penile Papules: These are small, dome-shaped bumps that can appear around the corona of the glans (the head of the penis). They are a normal anatomical variation and are not associated with any disease or infection. They are harmless and do not require treatment.

4. Molluscum Contagiosum: This is a viral infection that can cause small, painless bumps on the skin. While they can appear anywhere on the body, they are often found in the genital region. Molluscum contagiosum is typically self-limiting, but if the bumps are bothersome or persistent, treatment options are available.

5. Genital Warts: Caused by the human papillomavirus (HPV), genital warts can appear as small, flesh-colored or dark bumps. They are usually painless and can vary in size and shape. If you suspect this might be the case, it is important to consult a healthcare provider for appropriate management.

6. Skin Tags: These are small, benign growths that can occur anywhere on the body, including the genital area. They are usually skin-colored or slightly darker and are not harmful.

7. Melanocytic Nevi: These are moles that can appear on the skin, including the genital area. If they change in size, shape, or color, or if you notice any other concerning symptoms, it is advisable to have them evaluated by a dermatologist.

Given that you have already seen three urologists without a definitive diagnosis, it may be beneficial to consult a dermatologist who specializes in skin conditions. They can provide a more thorough examination and may suggest a biopsy if there is any concern about the nature of the bumps.

In terms of treatment, if the bumps are determined to be benign and not causing any symptoms, monitoring them may be the best approach. However, if they are bothersome or if there is any uncertainty regarding their nature, treatment options such as cryotherapy, laser therapy, or topical medications may be considered.

In conclusion, while there are several benign explanations for dark bumps on the penis, it is crucial to have a thorough evaluation by a qualified healthcare provider. Keeping track of any changes in the bumps, such as size, shape, or color, and reporting these to your doctor will aid in the diagnosis and management. Always prioritize your health and seek professional advice when in doubt.

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