Black spots on feet may be caused by trauma, pigmented nevus, melanoma, etc. Patients should seek medical treatment in time and carry out corresponding treatment after clarifying the causes. 1. Trauma: If the black spots on the feet of patients have not been traumatized before and the feet have been traumatized recently, it should be considered that the local skin bruises are caused by trauma, and this kind of people should pay attention to rest, usually no special treatment is needed, and the spots can be absorbed by themselves after a period of time. 2. Nevus pigmentosus: benign proliferation of melanocytes, when it occurs on the feet, it can be manifested as localized black spots, a small portion of it will be accompanied by itching or pain, and it can be surgically excised if it is relatively large or affects the aesthetics. 3. Melanoma: if there are black spots on the feet and keep expanding, melanoma formed by malignant transformation of melanocytes should be considered, and this kind of people should actively prepare for surgical resection, and patients with metastasis can adopt chemotherapy or combined chemotherapy. If you have black spots on feet, you should go to the hospital in time for examination and treatment under doctor’s guidance.