Moles on Thighs: When to Worry About Skin Changes

Black mole on the thigh?

Hello Dr.
Wu, I would like to ask about a mole on the outer side of my thigh near the waist that has been present for over ten years.
The mole is approximately 5mm in size, slightly raised, and has longer hairs growing on it.
Over the past few years, I have observed little change, but upon closer inspection, I am concerned about the shape and color distribution of the mole.
I have attached a photo for your reference: https://drive.google.com/file/d/1JBNSOedzNiVPzid0-zxJCTdWZJDw97jB/view?usp=drivesdk.

1.
Is it normal for the area around hair follicles to appear darker?
2.
Based on your assessment, is there a possibility that this mole could be malignant? Thank you, doctor.

Haha, 30~39 year old female. Ask Date: 2022/03/18

Dr. Wu Yuxin reply Dermatology

Medical regulations state that "a physician must personally examine a patient before providing treatment or prescribing medication..." Therefore, online diagnosis is also not permissible.
If you are experiencing significant distress, it is advisable to seek medical attention promptly.

Reply Date: 2022/03/18

More Info

When it comes to moles, also known as nevi, it is essential to monitor any changes in their appearance, size, color, or texture. The fact that you have had this mole on your thigh for over a decade and it has remained relatively stable is a positive sign. However, any concerns regarding changes in the mole's characteristics should be taken seriously.

1. Hair Growth on Moles: It is not uncommon for moles to have hair growing from them. This is generally considered normal and is not an indication of malignancy. Hair follicles can develop in moles just as they do in the surrounding skin. The presence of hair does not typically correlate with the mole's health status. However, if you notice any changes in the mole's appearance, such as increased hair growth, changes in color, or texture, it is advisable to consult a dermatologist.

2. Assessing the Mole for Malignancy: The characteristics of moles can provide clues about their potential for malignancy. The ABCDE rule is a helpful guideline for assessing moles:
- Asymmetry: If you draw a line through the mole, and the two halves do not match, it may be a cause for concern.

- Border: Irregular, scalloped, or poorly defined edges can indicate a problem.

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

- Diameter: Moles larger than 6mm (about the size of a pencil eraser) are more likely to be problematic.

- Evolving: Any change in size, shape, color, or elevation, or any new symptom such as bleeding, itching, or crusting, warrants further evaluation.

Given that your mole has been stable for several years, it is likely benign, but the changes you are observing in its appearance should not be ignored. If you have concerns about the mole's color distribution or any other changes, it is best to consult a dermatologist for a thorough examination. They may recommend a dermatoscopic evaluation, which allows for a more detailed view of the mole's structure, or even a biopsy if they deem it necessary.

In summary, while hair growth on moles is generally normal, any changes in the mole's appearance should prompt a visit to a healthcare professional. Regular skin checks and being aware of the characteristics of your moles can help in early detection of any potential issues. If you are ever in doubt, it is always better to err on the side of caution and seek professional advice.

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