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Real members of DiabetesTeam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.
December 20, 2025
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A DiabetesTeam Member

@A DiabetesTeam Member I'm pretty lethargic during the day also, Nancy. I shamelessly take a nap almost every afternoon. I find it works wonders. It does help that I'm retired and have that luxury. Try not to worry so much about the fatigue. Wishing you the best.

December 20, 2025
DiabetesTeam

Why am I extremely tired during the day despite managing my sleep apnea?

Even when sleep apnea is being treated, daytime fatigue can persist for several reasons related to diabetes. Your slightly low iron could be contributing, as anemia is a common cause of tiredness. However, there are other diabetes-specific factors to Show Full Answer

Why am I extremely tired during the day despite managing my sleep apnea?

Even when sleep apnea is being treated, daytime fatigue can persist for several reasons related to diabetes. Your slightly low iron could be contributing, as anemia is a common cause of tiredness. However, there are other diabetes-specific factors to consider.

Blood sugar imbalances are a major cause of fatigue. High blood sugar (hyperglycemia) makes your body work harder and can leave you feeling drained. When insulin levels are low, your body burns fat for energy instead of sugar, which is a slower process that produces less energy and more fatigue.

Low blood sugar (hypoglycemia) can also cause extreme tiredness, along with weakness and sluggishness. This can happen if diabetes medications work too well or if you eat less than usual without adjusting your medication.

Sleep apnea itself, even when treated, affects about 25% of people with type 2 diabetes and can still impact sleep quality. It increases carbon dioxide in the blood, which can cause morning headaches and worsen insulin resistance, leading to higher blood sugar levels and more fatigue.

Other factors that might be affecting your energy include:
- Frequent nighttime urination from high blood sugar
- Dehydration from elevated glucose levels
- Nerve damage causing discomfort
- Medication side effects

It's worth discussing with your doctor to check your blood sugar patterns throughout the day and ensure your sleep apnea treatment is truly effective. They can also evaluate whether your low iron needs treatment.

December 20, 2025
A DiabetesTeam Member

@A DiabetesTeam Member

I’m so glad to read that my friend ! 🤗🥰

December 23, 2025
A DiabetesTeam Member

@A DiabetesTeam Member Thanks Lorna. They really do help.😊

December 23, 2025
A DiabetesTeam Member

I’m low in Vitamin B12 (so my energy levels are low). I started getting B12 Injections yesterday and I’m having one a month for 3 months straight and then I will have another blood test to see if it has been successful in lifting my energy levels.

Our bodies are very complex systems and the blood tests also have questions about my folate levels (Vitamin B6) which the body needs for various purposes

I think I have to slow down during the extreme heat here In Subtropical Queensland Australia this Summer

Hugs from Judyxx

December 22, 2025

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