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Both high and low blood sugar can cause fatigue, but they do so in different ways. High blood sugar (hyperglycemia) is generally considered the more common and persistent cause of tiredness in people with diabetes.

Here's how each affects energy levels:

High Blood Sugar (Hyperglycemia)
- The body struggles to use sugar for Show Full Answer

Both high and low blood sugar can cause fatigue, but they do so in different ways. High blood sugar (hyperglycemia) is generally considered the more common and persistent cause of tiredness in people with diabetes.

Here's how each affects energy levels:

High Blood Sugar (Hyperglycemia):
- The body struggles to use sugar for energy due to insulin issues
- The body burns fat instead, which is a slower energy process
- This leads to less available energy and more fatigue
- Dehydration from frequent urination adds to tiredness
- Long-term high blood sugar can cause nerve pain and other complications that drain energy Low Blood Sugar (Hypoglycemia):
- Causes a more sudden, intense fatigue
- Often comes with shakiness, weakness, rapid heartbeat, and anxiety
- Can cause nightmares and poor sleep if it happens overnight
- Is potentially dangerous if left untreated

A DiabetesTeam member described high blood sugar fatigue as feeling "drugged, heavy, and slow," while low blood sugar fatigue tends to hit faster and more sharply.

The key takeaway is that keeping blood sugar levels stable is the best way to manage fatigue. Regular glucose monitoring can really help with that. Always talk to your doctor if fatigue is significantly affecting your daily life.

 AI-generated responses are not a substitute for medical advice. These services are not intended to diagnose, treat, or cure any condition or disease. Always ask your doctor about specific health concerns.

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