1.Thirst and dry throat: It indicates the increase of blood sugar and blood viscosity. Some people have no thirst symptoms despite the increase of blood sugar due to the insensitivity of the thirst center. 2, fatigue and weakness: The accumulation of metabolites in the cells of the body, so there is serious fatigue and weakness. 3.Rising blood pressure: When blood glucose rises, blood volume increases and blood pressure becomes high. 4.Body swelling: It indicates that the blood sugar decreases too fast, resulting in intracellular edema. 5, bloating and constipation: may be gastrointestinal smooth muscle weakness, autonomic nerve damage, excessive use of biguanides. 6.Headache and dizziness: two conditions are prone to headache and dizziness: high blood pressure and hypoglycemia. 7, skin flaking: dry skin, flaking, itchy, suggesting skin symptoms. 8, numbness in both feet: tingling in both feet, followed by numbness, glove-like loss of perception, suggesting the occurrence of diabetic peripheral neuritis. 9, skin discoloration: both feet pale, cold, and soon turn dark purple, indicating foot ischemia. Severe foot ischemia is a sign of gangrene of the extremity of the foot. 10, blurred vision: the appearance of near-sighted objects, while the object of vision is still good, indicating that the eye regulation function is reduced, may appear mild cataract. 11, Loose teeth: due to sulcular bone loss or periodontitis infection. 12.Redness of the visual field: Sudden redness of the visual field or red staining of visual objects, suggesting fundus hemorrhage. 13, skin blisters: mainly caused by “three high”. 14.Positive urine protein: indicates a decrease in renal tubular function. Continued positive urine protein, indicating the occurrence of diabetic nephropathy. 15, cerebrovascular accident: Patients suddenly feel dizzy and headache, salivation at the corners of the mouth, tightness on one side of the face, numbness on the opposite side, hands holding chopsticks on the ground, and difficulty in supporting the body, which is an aura of cerebrovascular accident or an indication of cerebral infarction. 16.Abnormal sweating distribution: If you find that some parts of the skin do not sweat, the amount of sweat is too little or too much, it indicates that the autonomic nervous function is damaged. If you have any of the above conditions, you need to treat them positively, suggesting that complications of diabetes are likely to occur and that you should seek treatment or change your treatment plan in a timely manner.