2) Increased Thirst
This sign is directly related to frequent urination. High glucose levels in the blood lead to increased production of urine and frequent urination as a result. Excretion of glucose also pulls out water and salts from the blood and leave you dehydrated. Low levels of water stimulate the thirst center in the brain and consequently you develop a dry mouth and feel thirsty.
Make sure to visit your doctor if you notice frequent urination and drinking more than usual, or that you feel thirsty more often or your mouth remains dry even after drinking fluids after regular intervals.