To contact us, please email

Basic Knowledge

Causes of Highs and Lows

By in Basic Knowledge

There are many factors that affect glucose. You have control over some of them, but not all. The key is to focus on the things you can control. And remember, a number is just a number.  It’s not about good or bad.  It’s about using the number to take action and get  your glucose levels back in your target range.

Factors That Can Cause High Glucose Levels

  • Foods with carbohydrates
  • Not getting enough insulin
  • Stress
  • Illness
  • Some types of exercise such as weight-lifting or competitive sports
  • Hormones
  • Some medications, like steroids

Factors That Can Cause Low Glucose Levels

  • Too much insulin
  • Not eating scheduled meals and/or snacks
  • Illness
  • Some kinds of exercise

Talk to your diabetes care team for strategies to manage high and low glucose levels.


How Foods Affect Glucose Levels

Diabetes and Exercise

Sick Days

What is Hypoglycemia?

What is Hyperglycemia?


42 Factors That Affect Blood Glucose — diaTribe

Getting to Goal – The Four Biggest Game-Changers for Improving My Diabetes Management — diaTribe

Hyperglycemia — U.S. National Library of Medicine

Hypoglcyemia — NIDDK

Reviewed by Angelina Bernier, MD , 3/6/19

This document is not intended to take the place of the care and attention of your personal physician or other professional medical services. Our aim is to promote active participation in your care and treatment by providing information and education. Questions about individual health concerns or specific treatment options should be discussed with your physician.