What Causes Fatigue and Weakness?

Applies to:
Patients using HLTHI.life’s Fatigue & Weakness service

Summary:
Fatigue and weakness can have many causes. Here’s how HLTHI’s physicians evaluate your symptoms and guide you toward recovery.

Potential Causes We Address

Your board-certified, licensed physician can assess symptoms related to:

• Post-viral or illness recovery fatigue (e.g., after COVID or flu)

• Poor sleep or sleep disturbances

• Dehydration or nutritional deficiencies

• Mild anxiety or stress-related fatigue

• Low-level viral symptoms or medical conditions

• Lack of physical activity or overall deconditioning

When Further Testing May Be Needed

If your fatigue or weakness is persistent or accompanied by other symptoms, your physician may recommend:

• In-person blood work (e.g., thyroid, anemia, vitamin D levels)

• Physical examination for potential neurological or metabolic issues

• Cardiac or pulmonary evaluation, if indicated

Medical Disclaimer

This article is for general informational purposes only and does not substitute professional medical advice. Always consult your physician if you experience persistent or worsening fatigue or weakness.