Patients can determine whether they have diabetes from the following symptoms: First, the patient usually does not drink much water, but there is obvious thirst, excessive drinking, polyuria, especially night urination is more, need to get up 2-3 times at night. Second, the patient has no obvious cause to appear obvious weight loss, and accompanied by polyphagia easy hunger, that is, the patient itself eats more, but the weight is in the process of gradual decline. Third, the patient finds that the urine is foamy and sticky, or the urine easily attracts ants and flying insects. Patients have unexplained skin fungal diseases, such as onychomycosis or onychomycosis. V. Patients find that the skin cannot heal after breaking. All of the above conditions may have diabetes, and patients should go to the hospital for examination in a timely manner.