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What causes black moles to grow on the soles of the feet?

Nov 14, 2024 Source: Cainiu Health
Dr. Liu Wenmin
Introduction
In general, black moles on the soles of the feet may be caused by congenital factors, pigmentation, post-traumatic healing, pigmented nevi, melanoma, or other reasons, and require different treatments depending on the specific situation. If you have a black mole on the sole of your foot, avoid scratching or picking at it yourself. Closely monitor any changes in the mole, such as its size, shape, color, or whether there is itching, pain, or ulceration.

Generally, black moles on the soles of the feet may be caused by congenital factors, pigmentation, wound healing, pigmented nevi, melanoma, and other reasons, and require different treatments depending on the specific situation.

1. Congenital factors: During embryonic development, melanocytes may locally accumulate while moving toward the epidermis, forming a black mole on the sole. Generally, no special treatment is required, but close observation of its size, shape, and color is recommended.

2. Pigmentation: Friction, ultraviolet radiation, or skin inflammation may cause pigmentation, resulting in spots on the sole that resemble black moles. It is recommended to wear appropriate footwear and observe daily for any changes in the size, shape, or color of the mole.

3. Wound healing: Inflammation caused by trauma can stimulate melanocytes to produce more melanin, which may lead to pigmentation during the healing process. During wound healing, medications such as recombinant human epidermal growth factor gel or vitamin E cream may be used under a doctor's guidance to reduce pigmentation.

4. Pigmented nevus: A pigmented nevus is a benign skin tumor composed of nevus cells and may appear on the sole of the foot. It is usually round or oval, with uniform color and clear borders. If the pigmented nevus enlarges, the borders become blurred, or symptoms such as itching or ulceration appear, medical attention should be sought promptly for pathological examination to determine whether malignancy has developed.

5. Melanoma: Melanoma is a highly malignant skin tumor. If a black mole on the sole shows irregular borders, uneven coloration, or significant changes in a short period, it may be melanoma. In such cases, surgical excision under medical guidance is recommended, possibly combined with radiotherapy, chemotherapy, and other comprehensive treatments to prevent recurrence.

If you have a black mole on your foot, avoid scratching or picking at it yourself. Closely monitor any changes in its size, shape, or color, as well as any symptoms such as itching, pain, or ulceration.

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