Does Diabetes Cause Fatigue?

Fatigue is a common problem which affects everyone from time to time. 

Fatigue may occur if the blood glucose (sugar) level is high. This causes large amounts of water to be lost through the urine. The resulting dehydration (as well as the need to run to the bathroom every few hours!) can make you feel tired.

What are some other causes of fatigue and what are the symptoms? 

• Hypothyroidism (a low level of thyroid hormone) – People with hypothyroidism often feel cold all the time and may be constipated. They may develop dry skin and hair. Women with hypothyroidism may have trouble getting pregnant and may notice heavier or irregular menstrual periods.
• Hormonal changes – This may include women who are going through menopause and notice changes in their sleep patterns (excessive sweating, hot and cold flashes, inability to sleep).
• Drugs and alcohol – Including some prescription drugs such as sedatives and sleeping pills may cause fatigue.
• Anxiety and depression – People with anxiety often have trouble sleeping and may still feel tired when they wake up. People who are depressed may feel sad or hopeless, lose their appetite (or eat excessively) and lose weight. 
• Disrupted sleep – Fatigue may be related to disrupted sleep or poor sleep behaviours. For example, these behaviours may include screen time just before bed or eating a heavy meal at the end of your day.
• Other disorders not related to diabetes – Heart, lung, and kidney disease; anemia and other blood disorders; and some infections may cause fatigue. However, people with these conditions usually have other symptoms and should be seeing a doctor for management.  

We are learning more and more about the importance of sleep and its role in living well with diabetes. If fatigue is a concern to you, follow up with your healthcare provider.

About the author

Diana Sherifali

Diana is a nursing professor at McMaster University and has presented and led many educational, advocacy and research initiatives in Canada and globally. Her research focuses on the development and evaluation of self-management strategies to support people living with or impacted by diabetes.