Some patients with high blood sugar may have no obvious symptoms, while some may have a series of symptoms such as excessive drinking, excessive eating, excessive urination, etc., and may even have symptoms of corresponding complications, so there is no such thing as “5 symptoms of high blood sugar”. High blood glucose is a condition in which the glucose concentration in the blood is chronically higher than normal. Early hyperglycemia patients may not have obvious clinical manifestations, usually found in the process of blood glucose monitoring. Some patients may have symptoms such as excessive drinking, excessive eating, excessive urination, and weight loss, which are especially common in patients with type 1 diabetes. In addition, hyperglycemia may also be characterized by itchy skin. Moreover, some patients with hyperglycemia may also have diabetes-related complications, such as diabetic ketoacidosis, which may include nausea, vomiting, and the smell of rotten apples in the breath, and urinary tract infections, which may include urinary frequency, urinary urgency, urinary pain, fever, and other symptoms. Patients with symptoms of hyperglycemia are advised to go to the hospital.