7 Warning Night Symptoms Of High BLOOd Sugar September 2, 2026 by If high blood sugar interrupts sleep, causes dehydration, or leaves the body struggling to use glucose properly, you may wake up tired, foggy, or with a headache. This can happen even after spending enough hours in bed. « Previous Next » 23 Pages: 1 2 3 4 5 6 7 8 9 10