Early diabetes usually does not have a specific five signals, most of the no obvious symptoms, may also appear the performance of the skin itching, more food, thirst and drink more urine, numbness of the limbs and other symptoms, specific symptoms and performance is recommended to consult a doctor. 1. Itchy skin: Due to the elevation of blood glucose in the body, the stimulation of skin by high blood glucose can make a part of the population have itchy skin, which is obvious in the vulva. 2. Eating more: some patients have less insulin secretion, resulting in elevated blood sugar, the sugar in the food can not provide energy, so the body wants to take more food, will feel hungry, so eating more. 3. Thirst and excessive drinking and urination: Because of high blood glucose, patients have osmotic diuresis, so they urinate a lot, and then they have thirst and excessive drinking. 4. Numbness of the limbs: long-term poor control of diabetes mellitus patients to a certain extent will appear peripheral neuropathy, resulting in numbness of the limbs, and even pain. It is recommended that diabetic patients need to consult the endocrinology department, under the guidance of the doctor for treatment.