If you have diabetes, you probably know the warning signs of low blood sugar, or hypoglycemia. "It's been described best as a little like the feeling you get when you're sliding on ice in a car: panic, rapid heart rate, [and] sort of a sense of doom," says John Buse, MD, PhD, professor of medicine, chief of the division of endocrinology, and executive associate dean for clinical research at the University of North Carolina at Chapel Hill School of Medicine.
You also probably know that hypoglycemia...
Test for ketones if you have type 1 diabetes and your sugar level is above 240mg/dL -- or if your doctor tells you to. Ketones are a form of waste that people with type 1 make when they’re under stress (like an illness). Call the doctor if you find ketones in your urine. Depending on how sick you are, he may suggest you go to the emergency room.
Check your temperature regularly.
Drink liquids if you can’t keep solid food down. Have one cup of liquid every hour while you’re awake to prevent dehydration. If you can’t hold down liquids, you may need to go to the emergency room or hospital.
Don’t stop taking insulin, even if you can’t eat solid food. You may need to eat or drink something with sugar so that your blood sugar doesn't drop too low.