the Risks of Moles on the Soles: A Dermatologist's Insight

Questions about the location of moles on the soles of the feet?

Dear Dr.
Wu,
I have two black moles on the sole of my right foot.
In January 2023, I visited a dermatologist who examined them with a dermatoscope and deemed them benign.
Regarding the locations of the moles on my foot: one is located at the center of the sole (the arch), and the other is on the inner side beneath the big toe, positioned on the forefoot, which is a pressure point when walking and experiences greater friction.
I would like to ask Dr.
Wu the following questions:
Q1.
Does the different location of the black moles on the sole affect their likelihood of malignant transformation? For example, does the mole located on the forefoot, being in a pressure point and experiencing more friction, have a higher risk of becoming malignant? Or is it the case that the location of the moles on the sole does not significantly matter in terms of their risk?
Q2.
Following up on the previous question, can benign moles on the sole, regardless of their location (such as pressure points or non-pressure points like the arch), be monitored for changes over time? If there are no significant changes, can I observe them myself and only seek medical attention if there are noticeable changes?
Thank you, Dr.
Wu.

Kris, 40~49 year old female. Ask Date: 2024/01/02

Dr. Wu Yuxin reply Dermatology

There is no specific statistic regarding the likelihood of malignancy for moles located on the soles of the feet.
All moles should be monitored over time for any changes, and any abnormal characteristics should prompt a visit to a healthcare professional.

Reply Date: 2024/01/02

More Info

Dear Patient,
Thank you for your inquiry regarding the moles (or nevi) on the soles of your feet. It’s great to hear that you have already consulted a dermatologist and that your moles were deemed benign. However, I understand your concerns about their locations and potential changes over time. Let’s address your questions in detail.

Q1: Does the location of moles on the soles of the feet affect their risk of malignant transformation?
The location of moles can indeed play a role in their risk of changes, but it is not solely determined by where they are on the body. Moles located on areas that experience more friction or pressure, such as the soles of the feet, may be subject to more irritation. This can lead to changes in appearance, such as thickening or color changes, which can sometimes be mistaken for malignant transformation. However, the risk of a benign mole becoming malignant is generally low, regardless of its location.
That said, it is essential to monitor any mole for changes in size, shape, color, or texture, as these can be indicators of potential malignancy. The American Academy of Dermatology recommends the ABCDE rule for monitoring moles:
- Asymmetry: One half is unlike the other half.

- Border: Irregular, scalloped, or poorly defined edges.

- Color: Varied from one area to another; shades of tan, brown, black, or sometimes white, red, or blue.

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

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

In your case, while the mole on the pressure point of your foot may be more prone to irritation, it does not inherently increase the risk of malignancy. Regular self-examination and professional check-ups are crucial.

Q2: Can benign moles on the soles of the feet be monitored without immediate intervention?
Yes, if your moles have been evaluated by a dermatologist and deemed benign, and if they have not changed over time, it is generally acceptable to monitor them. Regular self-examinations are important, and you should be vigilant for any changes in the moles. If you notice any of the ABCDE characteristics mentioned above, or if the moles become painful, itchy, or bleed, you should seek medical attention promptly.

It is also advisable to have regular dermatological check-ups, especially for areas that are less visible and may not be easily monitored. The soles of the feet can sometimes be overlooked, so having a professional evaluate them periodically can provide peace of mind.

In conclusion, while the location of your moles may subject them to more friction, it does not significantly increase their risk of becoming malignant. Continuous monitoring and awareness of any changes are key. If you have any further concerns or if you notice any changes, do not hesitate to reach out to your dermatologist for further evaluation.

Best wishes for your health, and thank you for prioritizing your skin health!
Sincerely,
Doctor Q&A Teams

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