People with diabetes do not usually lose energy when their blood sugar drops to normal. After the diagnosis of diabetes mellitus, we need to control the diet, appropriate exercise and take metformin and other oral hypoglycemic drugs or insulin injection treatment, after the blood glucose level is reduced to normal, the corresponding clinical manifestations caused by diabetes mellitus will also be relieved, so generally will not cause the situation of lack of energy. One of the treatments for diabetic patients is diet control, if the diet control method is not appropriate, resulting in a lack of nutrients may lead to poor physical condition and lack of energy; or insufficient rest may also lead to lack of energy; and, diabetic patients with hypoglycemia may also have symptoms such as fatigue, hunger, and cold sweats. In addition, lack of energy may be caused by anemia, hypothyroidism and other diseases. Patients with diabetes who have a lack of energy are advised to go to the hospital and ask the doctor to make a judgment.