There are many reasons for dark toes, such as trauma, skin diseases caused by hyperpigmentation, diabetic foot, etc., need to be analyzed according to the symptoms. 1. Trauma: local excessive friction stimulation caused by hyperpigmentation, or by external pressure, bruises caused by subcutaneous bruising, etc., can also lead to black toes. 2. Pigmentation caused by skin diseases: for example, tinea pedis, eczema and other skin diseases, after treatment, the pigmentation caused by the recovery of the disease can also lead to black toes. 3. Diabetic foot: chronic diabetes caused by peripheral neuropathy, as well as vascular lesions, may cause local oxygen supply, blood supply is insufficient, thus causing black toes. Toe skin black, there may be other reasons, need to go to the regular hospital in time to check, clear cause.