Black Spots on the Penis: When to Seek Dermatological Advice - Dermatology

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Black spots on the foreskin?


Hello doctor, recently I read some articles about melanoma and checked my body.
I found an oval-shaped mole at the tip of my foreskin, with a long axis of about 0.8 cm and a short axis of about 0.5 cm.
The shape is usually regular and symmetrical, and the color is a simple black.
However, when I stretch the skin, the edges become irregular, and the color changes to a more brownish tone.
I believe this mole has been there since childhood, but I still wanted to ask about it.
Additionally, I have 7 to 8 other moles on my genital area, most of which are below 0.2 cm.
Is this normal?

Jia, 20~29 year old female. Ask Date: 2012/10/25

Dr. Wu Yuxin reply Dermatology


It is not possible to determine if it is normal without examining each lesion individually or performing a biopsy.
A verbal description alone is insufficient for assessment.
It is recommended to consult a professional physician for a diagnosis.

Reply Date: 2012/10/25

More Info


When it comes to skin changes, especially in sensitive areas such as the genital region, it is crucial to approach the situation with caution and seek professional medical advice. The presence of black spots or any unusual growths on the penis can be concerning, and understanding when to seek dermatological advice is essential for your health.

From your description, it seems you have noticed an oval-shaped black spot on the glans of the penis, measuring approximately 0.8 cm by 0.5 cm. You mentioned that it appears symmetrical and has a uniform color, which is a positive sign. However, the fact that the edges become irregular and the color changes to a brownish hue when stretched is something that warrants further investigation.
In dermatology, any new or changing skin lesion, especially those that have been present for a long time but show signs of change, should be evaluated by a healthcare professional. While many skin lesions can be benign, such as seborrheic keratosis or benign moles, changes in color, shape, or texture can indicate a need for further evaluation to rule out conditions such as melanoma or other skin cancers.

The presence of multiple smaller spots (7-8) on the genital area, each measuring around 0.2 cm, can also be normal, as various benign conditions can cause such spots. Common benign conditions include pearly penile papules, which are small, dome-shaped bumps that are typically harmless and common in men. However, it is essential to differentiate these from other conditions that may require treatment.

Here are some key points to consider regarding your situation:
1. Monitor Changes: Keep an eye on the black spot and the smaller lesions. Note any changes in size, color, or shape, as well as any associated symptoms such as itching, bleeding, or discomfort.

2. Seek Professional Evaluation: Given your concerns and the changes you've observed, it is advisable to consult a dermatologist or a urologist. They can perform a thorough examination and may recommend a biopsy if there is any suspicion of malignancy.

3. Avoid Self-Diagnosis: While it is helpful to research and understand potential conditions, self-diagnosing can lead to unnecessary anxiety or misinterpretation of symptoms. A healthcare professional can provide a definitive diagnosis.

4. Skin Care and Hygiene: Maintain good hygiene in the genital area, and avoid using harsh soaps or products that may irritate the skin. If you have any underlying skin conditions, managing those can help prevent further issues.

5. Educate Yourself: Understanding the signs of skin cancer and other dermatological conditions can empower you to seek help when necessary. Look for changes in the ABCDEs of moles (Asymmetry, Border, Color, Diameter, Evolving) as a guideline for when to seek help.

In conclusion, while the characteristics of the black spot you described may not immediately suggest a serious condition, the irregularity in its edges and color change upon stretching are concerning enough to warrant a professional evaluation. Early detection and treatment are crucial for any skin condition, especially those that may have the potential to be malignant. Therefore, I strongly encourage you to schedule an appointment with a dermatologist to discuss your concerns and receive appropriate care.

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