Type 2 diabetes mellitus in its mild form may be in its early stages, causing symptoms that mainly include excessive drinking, excessive urination, excessive eating, and weight loss, etc. There are also patients who may have no obvious symptoms. 1. Excessive drinking: This means that the patient is prone to thirst, and the amount of water he or she drinks increases. 2. Polyuria: excessive drinking itself will cause polyuria, and increased urinary glucose excretion, osmotic diuresis will also lead to an increase in the amount of urination and the number of times the patient urinates. 3. Eating more: diabetic patients with impaired glucose utilization, easy to hunger, the amount of food intake will increase significantly. 4. Weight loss: diabetic patients with impaired glucose utilization, can not provide energy for the body, if their own in the case of normal diet, there is an unexplained weight loss, need to be alert to diabetes. Early symptoms of type 2 diabetes are often not obvious, so it is recommended that individuals have regular medical checkups, and if they find abnormal blood sugar levels, they should seek medical attention in a timely manner to make a clear diagnosis and cooperate with their doctors for intervention and treatment.