Calf skin black ulcers, can be adjusted through symptomatic treatment and causative treatment methods. 1. Symptomatic treatment: calf skin blackened ulcers, need to carry out trauma treatment, it is recommended to clean and change the dressing every day, you can use isacridine wet compresses on the wound, if necessary, can be bandaged to stop bleeding, pay attention to the protection of the wound, to avoid causing another injury, if there is a combination of infected abscess and other cases, you can use potassium permanganate solution for rinsing, oral antibiotics such as amoxicillin drug treatment. 2. Treatment for the cause: If the skin is blackened due to varicose veins, you can have surgery or wear compression stockings to improve the varicose veins. If the ulcer is suspected of malignant lesions, biopsy pathology can be done, and serious cases need to be amputated surgical treatment. In normal life, it is recommended to develop good living habits, avoid prolonged sitting and standing, and elevate the affected limbs when resting to avoid blood reflux in the lower limbs, which affects the health of the body.