Diabetes is a systemic disease with many symptoms of hyperglycemia, and the main reactions are as follows: First, wasting. Because a large amount of glucose is excreted from the urine, the body fat decomposition to provide energy, producing the symptoms of wasting, the degree of wasting is related to the degree of elevated blood sugar. Second, thirst. High blood sugar produces osmotic diuresis and increased urine volume, producing symptoms of thirst. Third, hunger and polyphagia. Because a large amount of glucose is excreted with urine, patients often feel hungry and eat a lot, but lose weight. IV. Symptoms such as numbness and weakness in the hands and feet. Some patients may have numbness of hands and feet, unexplained weakness and other reactions. V. Decreased vision and visual fatigue. VI. Prone to infection and slow wound healing. For example, recurrent urinary tract infections and slow or non-healing skin wounds may be related to high blood sugar.