A typical hyperglycemic diabetic patient may initially have varying degrees of the three symptoms of polyuria, polyphagia, polyphagia and weight loss. Because hyperglycemia causes the kidneys to enhance urination, most people tend to first appear the performance of polyuria, the number of urination is obviously increased, the volume of urine is also significantly increased, and the increase in the number of night urination is more common. Because of the increase in urine volume appears the state of water shortage in the human body, the symptoms of thirst appear, and even appear to drink more, but many people who usually love to drink water often do not feel any abnormal, and even think that it is good for drinking water. Because of the abnormal energy consumption of high blood sugar in the body, the human body appears easy to hunger, especially before meals hunger symptoms are obvious, eating naturally increase, and will aggravate the rise of blood sugar, although eating more, but high blood sugar body energy can not be well used instead of the symptoms of wasting, in addition, because of the rise of blood sugar, the blood flow of the human body becomes slow may appear body dizziness, weakness, tiredness, mental state In addition, because of the elevated blood sugar, the body’s blood flow becomes slow, which may lead to dizziness, weakness, tiredness, mental state, and reduced physical strength. A small number of patients, such as type 1 diabetes, have acute complications at the beginning, such as diabetic ketoacidosis, which can lead to abdominal pain, nausea and vomiting, depression, etc. In severe cases, it can also affect the nervous system and lead to blurred consciousness or coma. There are also some diabetic patients who do not have any clinical symptoms at the beginning of the disease, but only find abnormal blood sugar during physical examination or examination. Other patients are found to have high blood sugar because of some other symptoms, such as wounds that do not heal easily during surgery, or recurrent skin or perineal infections that are not easily controlled. So the early stage of high blood sugar may include polyuria, polydipsia, polyphagia, weight loss, dizziness, weakness, lethargy, even abdominal pain, nausea and vomiting, mental depression, and impaired consciousness, but it may also be without any symptoms.