There is no definite amount of time that a patient with high blood glucose needs to be hospitalized for, it needs to be decided under the supervision of a doctor based on his/her blood glucose condition and the presence of complications. If the patient only has a slight increase in blood glucose, he/she usually needs to be hospitalized for about a week. Patients need to complete various tests after admission, such as liver and kidney function, complication screening, etc., and individualized treatment plans will be provided according to the severity of the disease. If the patient has a long course of disease, significant fluctuations in blood glucose, the formation of a variety of complications, such as fundopathy, peripheral neuropathy, diabetic foot, etc., the hospitalization time will be extended accordingly, may be between 10 to 15 days, or even longer. It is recommended that patients with high blood glucose go to the hospital in time, under the guidance of the doctor to clarify the disease typing, targeted treatment, so as not to delay the condition.