Letter F
Fatigue
Also known as: Tiredness, Exhaustion
Fatigue symptom guide: what it can mean, possible causes, and when to seek care. Educational only.
Overview
Fatigue can follow poor sleep, anemia, infection, stress, or chronic disease. It is not one diagnosis. Sudden fatigue or fatigue with weight loss needs evaluation.
Possible causes
- Lack of sleep
- Anemia
- Infection (e.g. malaria)
- Stress
- Diabetes or thyroid issues
When to see a doctor
See a clinic if fatigue lasts weeks or comes with fever, weight loss, or breathing trouble.