Blackened toes may be related to discoloration of shoes and socks, trauma, diabetic foot and so on. 1. Decolorization of shoes and socks: some patients wear poor quality shoes and socks, which decolorize and lead to black toes. 2. Trauma: It may be that the soft tissues of the toes are damaged after being hit by external force, resulting in bruising within the local area, which may later turn black. 3. Diabetic foot: it may be that the patient’s blood sugar control is not good, and the blood circulation and nerves in the foot have been seriously damaged, resulting in the foot not getting sufficient blood supply, thus necrosis occurs. Black toes can also be seen in other reasons, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or treatment.