The black spots on the feet are considered to be subcutaneous bruises, pigmented nevi, plantar warts and so on. 1. subcutaneous bruising: when the capillaries in the feet are ruptured and bleed due to external forces and strain, subcutaneous bleeding can be induced, manifesting itself as black spots on the feet. 2. Pigmented nevus: pigmented nevus may be related to congenital heredity, developmental defects and trauma, immunosuppression, ultraviolet radiation and other factors. Patients will have spots, papules and patches on localized skin, which can be manifested as black spots on feet. The pigmented nevus is usually well defined, with regular edges and uniform color, but it can also be brown or brown. 3. metatarsal warts: metatarsal warts can also cause some of the patients feet long black spots. The plantar warts are caused by the human papilloma virus infection, the local skin will appear yellowish or brownish-yellow plaque, and after removing the cuticle can be seen in the soft core of the keratin, surrounded by capillary rupture bleeding formed by the small black spots. Some patients’ feet can also be accompanied by rough patches and pain. It is recommended that people with black dots on the feet seek medical examination in order to clarify the disease and then follow the doctor’s instructions to take therapeutic measures.