The symptoms are due to persistent high levels of sugar in the circulating blood. These symptoms are

Frequent urination - When blood sugar is too high, your kidneys can't absorb the excess glucose. The glucose leaks into urine, pulling water with it.

Extreme thirst - The process of dehydration makes you thirsty.

Blurry vision - High blood sugar may cause new blood vessels to form and may damage old blood vessels on the retina at the back of your eye.

Weight loss - To make up for the lost fuel, your body burns fat reserves, and you may lose weight.

Fatigue - When your cells don't get enough glucose, their primary fuel source, fatigue results.

Hunger - Burning of fat reserves also may make you hungry.