A diabetic foot that is black and ulcerated cured is likely to recur. The diabetic foot is the leading cause of non-traumatic amputation in people with diabetes and is one of the most serious and costly chronic complications of diabetes to treat. Therefore, diabetic patients with chronic poor glycemic control who do not actively cooperate with treatment have a higher risk of amputation than non-diabetic patients. Patients who are cured of diabetic foot blackening and ulceration should follow the doctor’s instructions, actively control their blood glucose, regularly monitor their blood glucose levels, and keep their blood glucose levels within the desired range; poor blood glucose control may lead to recurrence of diabetic foot, and the consequences may be more serious. When diabetic patients develop diabetic foot, they must go to the endocrinology department in time to avoid further aggravation of the condition.