Concerns About New Moles on the Penis: What You Need to Know - Dermatology

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I have a mole on my foreskin, and I'm very worried?


Hello Doctor, I have a question.
Over the past few months, I have noticed several moles appearing on my foreskin, about four or five in total.
One of them resembles a small birthmark and has been there since I was in the ninth grade.
Additionally, there is another mole at the base of the penis that has also appeared recently.
I am concerned if excessive melanin could cause this condition.
I hope you can help me.
I maintain regular hygiene, but I am worried that these new growths could indicate a pathological change, even though they do not seem to be enlarging.
Thank you very much for your assistance.

fpopkk, 10~19 year old female. Ask Date: 2004/11/13

Dr. Huang Ruiyun reply Dermatology


Online diagnosis is not possible; please visit a dermatology or urology clinic for medical evaluation.

Reply Date: 2004/11/13

More Info


When it comes to concerns about new moles or skin changes, especially in sensitive areas like the penis, it’s essential to approach the situation with caution and awareness. The appearance of new moles or changes in existing moles can be a source of anxiety, and it’s understandable to seek clarity on what these changes might mean.

Firstly, it’s important to recognize that moles, or nevi, are common skin growths that can appear anywhere on the body, including the genital area. They are usually benign, meaning they are not cancerous. However, the development of new moles, especially if they appear suddenly or change in appearance, warrants a closer examination.

In your case, you mentioned that you have noticed several new moles over the past few months, and one area resembles a birthmark. While it’s possible for moles to develop due to an increase in melanin production (the pigment that gives skin its color), the sudden appearance of multiple moles can sometimes be a sign of other underlying conditions. Factors such as hormonal changes, sun exposure, and genetic predisposition can influence the development of moles.

It’s crucial to monitor the characteristics of these moles. The ABCDE rule is a helpful guideline for assessing moles:
- Asymmetry: If one half of the mole does not match the other half.

- Border: Irregular, scalloped, or poorly defined edges.

- Color: A variety of colors (brown, black, tan, red, white, or blue) within the same mole.

- Diameter: Moles larger than 6mm (about the size of a pencil eraser) should be examined.

- Evolving: Any change in size, shape, color, or elevation, or new symptoms such as bleeding, itching, or crusting.

If any of these characteristics apply to your new moles, or if you notice any changes in existing moles, it’s advisable to seek a professional evaluation from a dermatologist. They can perform a thorough examination and may recommend a biopsy if there is any suspicion of malignancy.

In terms of hygiene, maintaining proper cleanliness in the genital area is essential, but it does not directly prevent the formation of moles. Regular washing is good practice, but it’s also important to avoid excessive irritation or trauma to the skin, which can sometimes lead to changes in the skin’s appearance.

Your concern about the possibility of these moles being indicative of a disease is valid. While most moles are harmless, any new growths should be evaluated, especially if they are accompanied by other symptoms. Conditions such as melanoma, a serious form of skin cancer, can develop in moles, and early detection is key to successful treatment.

In summary, while the appearance of new moles can be common and often benign, it’s essential to monitor them closely and consult a healthcare professional for a thorough evaluation. Don’t hesitate to reach out to a dermatologist who can provide you with the necessary guidance and reassurance. Taking proactive steps regarding your skin health is always the best approach.

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