What is the difference between diabetes and hyperglycemia?

Diabetes is due to insulin function defects or insulin sensitivity caused by reduced, patients will appear polyuria, polydipsia, weight loss, polyphagia and other symptoms, and hyperglycemia is a state, may be due to excessive intake of sugary foods caused. It is recommended to go to the hospital to do glucose tolerance test, if it is caused by diabetes, you can follow the doctor's advice with insulin or hypoglycemic drug treatment.