Whether or not it is dangerous for a diabetic to appear to be losing weight too fast should be determined on a case-by-case basis, but the condition should be clarified in a timely manner by visiting a hospital. There may be the following reasons for diabetes to lose weight too fast: 1. When diabetic patients have poor glycemic control, glucose can not be normally absorbed and utilized by the body, but can only decompose fat and protein to provide energy, resulting in excessive fat and protein consumption, while losing water in the body, the phenomenon of wasting. Diabetic ketoacidosis, diabetic hyperglycemic hyperosmolar state and other acute complications of diabetes can also be complicated, this time the condition is serious, and even life-threatening, should be treated immediately. 2. Certain hypoglycemic drugs may be accompanied by weight loss while controlling blood glucose, such as glucagon-like peptide receptor agonists, sodium-glucose co-transporter protein 2 and other hypoglycemic drugs have a weight loss effect. If diabetic patients use the above drugs under the guidance of specialists, and monitor the blood glucose control standards, without other complications, do not worry too much, endocrinology specialists can be followed up regularly. 3. Dietary control is too strict will also appear weight loss: some diabetic patients in order to control blood glucose, dietary control is very extreme, every day starvation, basically do not dare to eat anything, calorie intake is insufficient, resulting in nutritional deficiencies, body thinning. Such patients should consult the hospital in a timely manner, adjust the sugar-lowering program, the correct and reasonable diabetic diet. Diabetic patients should be diabetes treatment under the guidance of endocrine specialists. If the phenomenon of losing weight too fast, you should go to the regular hospital in time to clarify the condition, to avoid malnutrition and other conditions.