The most typical symptoms of diabetes are “three more and one less”, that is, eating more, drinking more, urinating more, and losing weight in a short period of time. When these symptoms appear, it is usually related to diabetes, and if the blood sugar is high, then it is undoubtedly diabetes. Diabetes is called “the cancer that never dies”, which shows how terrible it is. Diabetes is incurable for life and can only be treated with medication, and there are many taboos in life and diet that must not be violated, which has a great impact on normal life and work. However, there is nothing that medicine can do about it. As long as the symptoms are controlled and do not interfere with normal life, it is appropriate. When it comes to the symptoms of diabetes, it is the same as other diseases, generally no symptoms in the early stage, or symptoms are not obvious. During a normal physical examination, there can be an increase in fasting blood glucose, but this cannot be the only criterion, and can be judged in conjunction with whether there is an increase in postprandial blood glucose. Glucose tolerance test can be performed, and if the blood sugar is still greater than 11.1mmol/l after two hours of taking glucose, the patient can be diagnosed as a diabetic. With the development of the disease, the symptoms of diabetic patients will gradually increase, and even aggravate, its specific performance: First, “three more and one less” more drinking, more food, more urine, weight loss, which is the most common symptoms, mostly seen in type 1 diabetes; Second, weakness, dizziness, obesity, sweating and other symptoms, which is mostly seen in type 2 diabetes ; third, diabetes complications: long-term elevated blood sugar may lead to microvascular and nerve damage, such as fundus lesions, hypertension, diabetic nephropathy, diabetic foot, diabetic peripheral neuropathy, etc.. This is the most serious problem of diabetes and can even affect the quality of life as a result. Thus, it can be seen that among the symptoms of type 2 diabetes, dizziness and weakness of limbs and easy sweating can occur.