Figuring out why drastic changes in blood glucose levels occur takes some doing. Here are some places to start looking for answers:
• Timing of insulin injections: The action times (onset, peak, duration)
are important to know when timing your insulin injections.
Would using an insulin pen or pump help?
• Injection sites: Are you on a regular rotation schedule? Most insulins
are absorbed at the most consistent rate from the abdomen.
• Injection depth: Do you inject your insulin at the same depth each
• Blood flow: Do you inject into areas where muscles are at work? Do
you smoke? Working muscles and warm temperatures speed up
absorption. Cool temperatures and tobacco slow down absorption.
• Food intake: Are you able to accurately count the carbohydrates in
your food? Does your carbohydrate-to-insulin ratio need to be
• Hypoglycemia: Do you have frequent bouts of very low blood
glucose? Your body’s natural defenses to this (glucose release from
the liver) can be spoiling your insulin’s work.
• Neuropathy: Do you have nerve damage that affects your absorption
of food? Nerve damage can slow digestion or can produce unexpected
bouts of diarrhea.
• Dehydration: Do you have sustained periods of high blood glucose
that drain your body of fluids? The less water in your body, the harder
it is for your insulin to flow into tissues.