Scrotal Skin Spots: Causes and Concerns - Dermatology

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Scrotal issues, melanin, and brown spots?


Hello, Dr.
Wu.
I have some questions regarding the skin on my scrotum and the surrounding area of my penis.
I recall that last year, I noticed many small spots on the side of my scrotum near the groin.
They are not exactly black; they appear to be brownish spots.
After measuring them with a ruler, I found that their average diameter is about 0.3 centimeters, with some spots being more densely packed and others more scattered.
My family has mentioned that there is a genetic predisposition to these spots, as my father, brother, aunt, and uncle all have similar spots on their arms, which appear to be about 0.5 centimeters or larger.
I am unsure when these spots first appeared; I don't know if they were present during my childhood but went unnoticed.
Therefore, I cannot determine if they suddenly appeared or if there has been a sudden increase in their number.
Recently, I have also noticed that small spots are starting to appear around the skin of my penis.
I have a habit of masturbation, estimating that I do it about 8 to 10 times a week, though there are weeks when it is less than 8 times.
Roughly estimating, there may be over 100 of these small spots.
However, they do not seem large; they are quite small, and when I look in the mirror, they are not very noticeable.
After feeling them, I found that they are flat and smooth to the touch.
During hot weather, I also experience eczema on the surface of the left side of my scrotum, but I have followed the pharmacist's advice and applied medication.
My question is, could these spots possibly be melanoma, an infection, or cancer? I am not concerned about their appearance, but I do worry about these spots.
I wonder if this could be due to excessive masturbation or if it is indeed a hereditary condition that makes me prone to developing these spots in this area.
I kindly request your preliminary diagnosis.
Thank you, doctor, for your time.

Er Ma, 20~29 year old female. Ask Date: 2022/05/12

Dr. Wu Yuxin reply Dermatology


Without actually seeing the lesion, it is impossible to determine the issue.
If it is causing significant distress, please seek medical attention promptly.
A proper examination is necessary to understand the problem and determine the appropriate course of action.

Reply Date: 2022/05/12

More Info


Understanding skin spots on the scrotum and surrounding areas can be concerning, especially when they appear suddenly or in greater numbers. Based on your description, it seems you have noticed small brownish spots on your scrotum and around the penis, which are smooth and do not seem to change in texture. You also mentioned a family history of similar spots, which could suggest a genetic predisposition.

Firstly, it is important to note that many skin conditions can present as spots or lesions, and not all of them are serious. The fact that these spots are small, smooth, and have been present for some time without significant changes is a positive sign. Here are some potential causes for the spots you are experiencing:
1. Seborrheic Keratosis: These are benign growths that often appear as brown or black spots on the skin. They are common in adults and can be hereditary. They typically do not require treatment unless they become irritated or bothersome.

2. Lentigines: Also known as age spots or liver spots, these are flat, brown spots that can develop due to sun exposure. They are usually harmless and more common in older adults, but they can appear in younger individuals as well.

3. Folliculitis: This is an inflammation of the hair follicles that can lead to small red or brown spots. It can occur due to irritation, infection, or blockage of the follicles.

4. Moles (Nevi): Moles can vary in size, shape, and color. If you have a family history of similar spots, they could simply be benign moles. However, any changes in size, shape, or color should be evaluated by a healthcare professional.

5. Dermatological Conditions: Conditions such as eczema or psoriasis can cause changes in the skin, including spots or patches. You mentioned experiencing eczema during hot weather, which could be related.

6. Infections: While less likely given your description, certain infections can cause spots or lesions on the skin. If there are any signs of infection (such as redness, warmth, or discharge), it would be important to seek medical evaluation.

Regarding your concerns about melanoma or other serious conditions, it is essential to monitor any changes in the spots. Melanoma typically presents as a new spot or a change in an existing mole, characterized by asymmetry, irregular borders, multiple colors, and a diameter larger than 6mm. Since your spots are small, smooth, and have not changed significantly, the likelihood of them being melanoma is lower, but it is always best to consult a dermatologist for a thorough evaluation.

As for the relationship between your habits (such as masturbation) and the appearance of these spots, there is no direct evidence to suggest that masturbation causes skin spots or lesions. However, excessive friction or irritation in the genital area could potentially lead to skin changes, so maintaining good hygiene and avoiding irritation is advisable.

In conclusion, while the spots you describe may be benign, it is crucial to have them evaluated by a healthcare professional, especially since they are increasing in number and you have a family history of similar spots. A dermatologist can provide a definitive diagnosis and recommend any necessary treatment or monitoring. Remember, early evaluation is key to addressing any potential concerns effectively.

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