The pancreas normally adjusts
the amount of insulin it makes based on your changing blood sugar. When you have diabetes, your insulin
injections can't control your blood sugar moment to moment, the way your pancreas
would. So you may have high and low bloodsugar levels from time to
Causes of high blood sugar
Causes of high blood sugar include:
Not getting enough
Eating more food than usual.
Stress and being
ill (such as with severe flu) or having an infection, especially if you aren't
eating or drinking enough.
medicines that can raise blood sugar levels, such as
those for sleep, some decongestants, and
corticosteroids (such as prednisone).
Sometimes a person's blood sugar level rises greatly before he or she knows something is wrong. Because insulin isn't available, the cells in
the body are unable to get the sugar (glucose) they need for energy. The body
begins to break down fat and muscle for energy.
When fat is used for energy,
ketones—or fatty acids—are produced and enter the bloodstream. This causes the
diabetic ketoacidosis. This can be a life-threatening