Diabetic patients who have been relatively thin weight should pay attention to the following issues: 1, to see if the patient’s blood sugar control is good, if the blood sugar has been relatively high, will lead to continuous weight loss, should be treated with oral hypoglycemic drugs and insulin, blood sugar improvement after the weight loss will improve. 2, diabetic patients who take oral metformin treatment should be discontinued as far as possible, because metformin can also cause weight loss. 3, diabetic patients should exclude gastrointestinal diseases that cause weight loss, diabetic patients should eat more food with high protein content, like meat, eggs, milk, etc. can increase weight.