Although cancer affecting the feet is uncommon, certain persistent changes in the skin, nails, or tissues of the feet should not automatically be dismissed. Skin cancers, including melanoma, can develop on areas that receive little sun exposure, including the soles of the feet and beneath or around the toenails. Warning signs may include a new or changing dark spot, a mole with an irregular shape or uneven color, a lesion that continues to grow, a sore that does not heal, persistent bleeding, or a dark streak beneath a toenail that changes over time. The American Academy of Dermatology recommends having a dermatologist examine a spot that is changing, itching, bleeding, or otherwise different from surrounding marks. (aad.org) A rare form of melanoma called acral lentiginous melanoma can occur on the palms, soles, and nail areas, so unusual marks in these locations deserve attention even when they are not exposed to sunlight.
Not every unusual foot change is related to cancer. Thickened toenails, athlete’s foot, bruises, warts, calluses, eczema, fungal infections, and minor injuries can all produce changes that look concerning. One particularly important distinction is a dark streak under a toenail. It can sometimes be caused by trauma or other harmless conditions, but melanoma beneath the nail is another possibility, especially when the pigment becomes wider, irregular, spreads onto the surrounding skin, or appears without an obvious injury. The American Cancer Society notes that melanoma can develop under a nail and may initially appear as a dark or brown-black discoloration. (cancer.org) Because appearance alone cannot establish the cause, persistent or changing pigmentation should be evaluated rather than self-diagnosed.
Make a medical appointment if you notice a new or changing spot on the foot, a persistent non-healing wound, unexplained bleeding, a rapidly growing lump, or a nail discoloration that does not resolve. Take particular notice of changes in size, shape, border, color, or symptoms such as itching and bleeding. Early evaluation does not mean you have cancer; it simply allows a healthcare professional to determine whether the change is harmless or needs further testing. (aad.org) Checking the soles of your feet and between your toes periodically can also help you notice changes that might otherwise remain hidden. Disclaimer: This article is for general educational and health information only and does not constitute medical diagnosis, treatment, or personalized advice. Most foot and nail changes are caused by conditions other than cancer, and a visual symptom alone cannot diagnose melanoma. Always verify important health information through reliable medical sources and consult a qualified healthcare professional about persistent, unusual, or changing foot or nail changes.
Leave a Reply