Diabetes is your bodies inability to control the sugar in your blood (BG). So you have to regulate it. BG need to be between 70 and 140/mg/dl or 4-6 mmol/l BG Significantly lower than 70 can if low enough cause death BG over 140 with enough time will cause complications of blindness, hart problems, kidney problems, infections, amputations of toes/feet/legs, death. If significantly high can cause coma.
stress, illness, carbohydrates raise BG
exercise, drugs lower BG