DEAR MAYO CLINIC: What are the most common symptoms of diabetes? Is it true that changes in my eyesight could mean I’m developing diabetes?
ANSWER: People who have diabetes have too much sugar in their blood. Although you can’t know your level of blood sugar without a blood test, high blood sugar may cause symptoms that are noticeable. The most common symptoms of diabetes are frequently feeling thirsty, urinating often, losing weight, feeling tired and having sores that heal slowly. Blurred vision or a change in eyesight also can be symptoms of diabetes.