High glucose indicates that the patient’s blood sugar is high, usually due to reasons such as excessive glucose intake, production, or decreased glucose breakdown. For example, excessive dietary intake, bad lifestyle habits, diabetes and other reasons. 1. Excessive dietary intake: If the patient consumes too much high-sugar, high-calorie food, it is broken down into glucose in the body, which can cause the glucose level in the serum to rise. 2. Bad life habits: patients who do not have a good rest the night before, such as staying up late, insomnia, etc., leading to hormone secretion disorders, the next day blood glucose may rise. 3. Diabetes mellitus: If the patient has diabetes mellitus, due to the impaired function of the pancreatic islets, the glucose ingested into the body can not be broken down and utilized in a timely manner, then high blood glucose will occur. It is recommended that patients with high glucose should consult a doctor in time to clarify the cause of the disease and follow the doctor’s instructions to do the appropriate treatment.