What is Chronic Fatigue Syndrome?
Chronic fatigue syndrome (CFS) is a complicated disorder characterized by extreme fatigue that lasts for at least six months and that can't be fully explained by an underlying medical condition.
The fatigue worsens with physical or mental activity, but doesn't improve with rest.
The cause of chronic fatigue syndrome is unknown, although there are many theories — ranging from viral infections to psychological stress. Some experts believe chronic fatigue syndrome might be triggered by a combination of factors.
Symptoms
Symptoms of chronic fatigue syndrome can vary from person to person, and the severity of symptoms can fluctuate from day to day.
Signs and symptoms may include:
- Fatigue
- Problems with memory or concentration
- Sore throat
- Headaches
- Enlarged lymph nodes in your neck or armpits
- Unexplained muscle or joint pain
- Dizziness that worsens with moving from lying down or sitting to standing
- Unrefreshing sleep
- Extreme exhaustion after physical or mental exercise
Possible complications of chronic fatigue syndrome include:
- Lifestyle restrictions
- Increased work absences
- Social isolation
- Depression
Source
https://www.mayoclinic.org/diseases-conditions/chronic-fatigue-syndrome/symptoms-causes/syc-20360490
