If you notice any of the symptoms below, you should see your doctor to get tested (lab tests can confirm a diagnosis):Excessive urinationConstant thirstUnusual weight lossFeeling weak or tiredBlurred visionTingling or numbness in the hands or feetCuts and bruises that are slow to healFrequent and recurring infections such as urinary tract infections (UTIs), boils, and fungusDifficulty with erectio