Not all fatigue is the same. Understanding the different types can help you identify causes and find appropriate solutions.
Physical vs. Mental Fatigue
The Mayo Clinic distinguishes between:
- Physical fatigue - Muscle weakness, reduced endurance
- Mental fatigue - Difficulty concentrating, decreased motivation
Acute vs. Chronic Fatigue
According to the CDC:
- Acute fatigue - Short-term, usually resolved with rest
- Chronic fatigue - Persistent, lasting more than 6 months
Common Causes of Fatigue
The National Heart, Lung, and Blood Institute lists potential causes:
- Insufficient sleep
- Poor nutrition
- Lack of physical activity
- Stress and mental health conditions
- Medical conditions (anemia, thyroid disorders)
- Medications
When to Seek Help
The Mayo Clinic recommends seeing a doctor if fatigue:
- Persists for more than two weeks
- Interferes with daily activities
- Has no apparent cause
- Is accompanied by other symptoms
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