It makes this new sugar from proteins that are taken away from our muscles. When blood glucose rises above a certain level, it is removed from the body in urine. Some people with long-term diabetes or kidney disease can have a very high kidney threshold. Sugar will not spill into the urine until the blood sugar is very high. Glucose cannot be passed out of the body alone.
Sugar sucks up water so that it can flow from the body.
The result is polyuria or excessive urination. People with excess glucose in their blood, as in uncontrolled diabetes, make frequent trips to the bathroom. Loss of water through urination triggers the brain to send a message of thirst. This results in a condition called polydipsia, or excessive thirst. Excessive urination can result in dehydration, leading to dry skin.