Usually the cause of this type of diabetes is not known. Sometimes the diabetes is the result of a viral infection or injury of the pancreas. It may also result from an immune system disorder. Symptoms may develop suddenly. Or they may develop gradually over days to weeks.
Symptoms vary widely from person to person.
Your health care provider will ask about your medical history and your symptoms and examine you. He or she will test the level of sugar in your blood. Sometimes another test called a glucose tolerance test is done. For this test a sample of your blood is taken when you have not eaten anything since the night before. Then you drink a sugar drink and your blood is tested 2 hours later.