As you sleep your blood glucose levels should normally decline.However,this hormone will cause your liver to release more of the sugar.

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Glucagon is the hormone that stimulates the liver to release glucose into the bloodstream, which is necessary to prevent hypoglycemia while sleeping as there may not be any food intake during that time. Insulin, on the other hand, promotes glucose uptake by the body's cells, thus lowering blood glucose levels and is not responsible for increasing glucose levels during sleep. Thyroxin is a hormone that regulates metabolism, and adrenaline is responsible for the "fight or flight" response in the body, neither of which play a role in blood glucose regulation during sleep.

As You Sleep Your Blood Glucose Levels Should Normally Decline