Diabetic patients are getting thinner and thinner, may be due to poor glycemic control, excessive control of diet, combined with other diseases, etc., should first clarify the cause of the disease and then actively adjust and treat. Poor glycemic control need to adjust the medication, excessive control of diet need to maintain balanced nutrition, other diseases such as hyperthyroidism, need to actively treat hyperthyroidism and so on. 1. Poor blood sugar control: diabetic patients’ blood sugar is not well controlled, which will lead to a large amount of sugar discharged from the urine, coupled with impaired glucose metabolism of the body, which will make the patient’s body weight become lighter and lighter. It is necessary to actively adjust the medication and strengthen the diet and exercise interventions so that the blood sugar reaches the standard. 2. Excessive control of diet: Dietary therapy is an important aspect of diabetes treatment, but some patients are too extreme in controlling their diets, such as not eating meat at all, not eating staple foods, and only eating vegetables, etc. This method is not desirable, and it will make diabetic patients suffer from severe malnutrition, and too little protein intake can lead to muscle loss, which will result in more and more thinness. Diabetic patients should be reasonable control of diet, to ensure that the total calorie intake, in the nutritional balance on the basis of moderate control of sugar, oil, salt intake. 3. Combination of other diseases: diabetic patients with good glycemic control, but if the combination of other diseases may also become thinner and thinner. Such as diabetes combined with hyperthyroidism, tuberculosis, malignant tumors and other consumptive diseases, can cause weight loss, so that the patient is getting thin. Need to actively treat related diseases. Diabetic patients are getting thinner and thinner, it is recommended to consult a doctor in a timely manner, identify the causes and then actively adjust the medication and treatment under the guidance of the doctor.