Are Moles Around the Anus Normal? Skin Changes and Risks

There are some moles around the anal area?

I have been experiencing itching around my buttocks, and after seeing a doctor, I was diagnosed with eczema.
The doctor also noticed some moles near the folds and edges of the skin around the anal area, but there is still some uncertainty.
Is it normal to have moles around the anus? I have seen cases of anal melanoma, which makes me a bit worried.
Should I undergo further examination? Additionally, could you please explain why moles develop? I thought the anal area wouldn't be exposed to sunlight, so why are there moles present?

C, 20~29 year old female. Ask Date: 2023/01/28

Dr. Zhang Shuhao reply Surgery

It is normal to have moles around the anus, just like on other areas of the skin.
Anal melanoma is a rare tumor (with an incidence of less than 0.0005%).
If you are concerned, you can visit a dermatologist or a colorectal specialist for an examination, and if necessary, a biopsy can be performed.
Anal melanoma is generally believed to be related to the differentiation of nerve cells and immune regulation, and it may not necessarily be associated with sun exposure.

Reply Date: 2023/01/28

More Info

Moles, or nevi, are common skin growths that can appear anywhere on the body, including around the anus. It is not unusual to have moles in this area, as they can develop due to a variety of factors, including genetics, sun exposure, and hormonal changes. While the skin around the anus is less exposed to sunlight compared to other parts of the body, moles can still form due to the proliferation of melanocytes, the cells responsible for producing pigment in the skin.

In your case, since you mentioned experiencing itching and that your doctor diagnosed you with eczema, it is essential to focus on the overall health of your skin. Eczema can cause inflammation, leading to changes in the skin's appearance, including the development of new moles or changes in existing ones. However, it is crucial to monitor any changes in the moles themselves, such as changes in size, shape, color, or if they become itchy or bleed.

Regarding your concern about anal melanoma, it is understandable to be worried, especially with the presence of moles in that area. Anal melanoma is a rare but serious form of skin cancer that can occur in the anal region. Risk factors include a history of sunburns, fair skin, and a family history of skin cancer. While the presence of moles is common, it is essential to be vigilant about any changes in them.

If you notice any of the following changes in your moles, it is advisable to seek further evaluation from a dermatologist:
1. Asymmetry: One half of the mole does not match the other half.

2. Border irregularity: The edges of the mole are ragged, notched, or blurred.

3. Color variation: The mole has different colors (brown, black, tan, red, white, or blue).

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

5. Evolving: The mole changes in size, shape, or color over time.

In terms of why moles can form in areas that are not exposed to sunlight, it is important to note that while UV exposure is a significant factor in the development of skin cancer, other factors can contribute to the formation of moles. These include genetic predisposition, hormonal changes, and skin friction. The skin around the anus is subject to friction and irritation, which can also play a role in the development of moles.

In conclusion, while having moles around the anus can be normal, it is essential to monitor them for any changes and to maintain regular check-ups with your dermatologist, especially if you have concerns. If your doctor has recommended further evaluation or if you have any new symptoms, such as increased itching or changes in the moles, it is wise to follow through with those recommendations. Early detection is key in managing any potential skin issues, including melanoma. Always prioritize your health and communicate openly with your healthcare provider about any concerns you may have.

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