1. Frequent Urination (Polyuria)
One of the hallmark symptoms of diabetes, especially undiagnosed diabetes, is increased urination. This occurs as the body tries to eliminate excess glucose through urine. When blood sugar levels are high, the kidneys work hard to filter and absorb the excess sugar. If they can’t, the excess glucose is excreted in the urine, drawing fluid from your tissues, causing dehydration and increasing the need to urinate.