Diabetes has become a common disease in people’s lives, the onset of the population is increasing, the younger the age, although the main symptoms of diabetes is three more and one less symptoms, but there are many people early often no obvious symptoms, diet and life is not much change. We have often heard that the main symptoms of diabetes are three more and one less, referring to more food, more drink, more urine, and wasting. This is a relatively common early symptom, mainly manifested as an unexplained increase in the volume of urine, and the increase in nocturia may be more obvious, often feel the obvious dry mouth, like to eat and drink more water, young patients may like to drink a lot of carbonated drinks, older patients like to eat sweets, thin rice, paste, etc.. In addition, the diet may also appear irregular, like late night snacking, like meat food, meal size increases significantly, and even though the meal size increases there is still often a feeling of hunger, especially before the next meal. Some female patients may experience vulvar itching because of elevated blood sugar and increased urine sugar. Despite the increase in diet and water intake, weight gain does not occur in early diabetes, but rather unexplained weight loss, which is due to excessive consumption of body fat and protein by abnormally high blood sugar. Therefore, the symptoms of early diabetes can be asymptomatic or can have symptoms of dry mouth, excessive drinking, excessive urination, and weight loss, and when these symptoms appear, you should go to the hospital early for a clear diagnosis.