Black Moles at the Base of the Penis: What You Need to Know - Dermatology

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A black mole at the base of the penis?


Hello doctor, I have recently noticed several black moles at the base of my penis, but I'm not sure how long they have been there.
I would like to ask if the density shown in the picture (about five or six moles in a small area) and their size are normal.
Could this be a sign of any pathological changes? Thank you for your clarification! Here is the image link: https://ibb.co/zmXssJh

Niming, 20~29 year old female. Ask Date: 2021/06/23

Dr. Wu Yuxin reply Dermatology


I apologize, but current medical regulations do not allow for online diagnoses in this manner.
If it is inconvenient to visit a hospital or clinic due to the pandemic, you may consult a dermatology clinic that offers telemedicine services, which can provide you with diagnosis and treatment according to the regulations.

Reply Date: 2021/06/23

More Info


When it comes to the appearance of black moles or spots at the base of the penis, it is essential to approach the situation with caution and seek professional medical advice. The presence of multiple black moles in a concentrated area can be concerning, and understanding their nature is crucial for your health.

Firstly, it is important to differentiate between benign and potentially malignant skin lesions. Benign moles, also known as nevi, are common and can vary in color, size, and shape. They are usually harmless and do not require treatment unless they change in appearance or cause discomfort. However, certain characteristics of moles can indicate a higher risk of skin cancer, particularly melanoma. The ABCDE rule is a helpful guideline for assessing moles:
- Asymmetry: One half of the mole does not match the other.

- Border: The edges are irregular, ragged, or blurred.

- Color: The color is not uniform and may include shades of brown, black, or even red, white, or blue.

- Diameter: The mole is larger than 6mm (about the size of a pencil eraser).

- Evolving: The mole is changing in size, shape, or color.

If your moles exhibit any of these characteristics, it is advisable to consult a dermatologist for a thorough examination. They may recommend a biopsy to determine whether the moles are benign or malignant.

In addition to melanoma, other skin conditions can cause dark spots or moles in the genital area. These include:
1. Seborrheic Keratosis: A non-cancerous skin growth that can appear as a brown, black, or tan lesion. They are often raised and have a scaly surface.


2. Lentigines: Commonly known as age spots or liver spots, these are flat, brown, or black spots that develop on sun-exposed areas of the skin.

3. Dermatofibromas: These are firm, raised nodules that can be brown or tan and are usually harmless.

4. Melanocytic Nevi: These are common moles that can be flat or raised and vary in color.

5. Skin Tags: Small, benign growths that can appear in areas where skin rubs against skin.

6. Genital Warts: Caused by the human papillomavirus (HPV), these can appear as small, flesh-colored or gray growths.

7. Pearly Penile Papules: These are small, harmless bumps that can appear around the corona of the penis and are a normal anatomical variant.

Given the sensitive nature of the area in question, it is crucial to avoid self-diagnosis and refrain from any home treatments. The genital area is prone to various skin conditions, and what may seem like a harmless mole could potentially be a sign of a more serious condition.

In terms of prevention and care, it is advisable to practice good hygiene, avoid excessive sun exposure, and regularly monitor any changes in your skin. If you notice any new growths, changes in existing moles, or any other concerning symptoms such as itching, bleeding, or pain, seek medical attention promptly.

In conclusion, while the presence of black moles at the base of the penis may not necessarily indicate a serious condition, it is essential to have them evaluated by a healthcare professional. Early detection and diagnosis are key to effectively managing any potential skin issues. Always prioritize your health and well-being by consulting with a qualified dermatologist who can provide personalized advice and treatment options based on your specific situation.

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