Diabetes can manifest subtly during the night, with symptoms often going unnoticed until they begin to interfere with sleep. One of the most common signs is frequent urination during the night, caused by the body trying to eliminate excess glucose. This often leads to increased thirst as the body becomes dehydrated. Night sweats, caused by nocturnal hypoglycemia (low blood sugar levels), are another warning sign that may wake someone abruptly in the night.