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Conditions
----------

*   [Chronic fatigue syndrome](#chronic-fatigue-syndrome)
*   [Fibromyalgia](#fibromyalgia)

Chronic fatigue syndrome
------------------------

Chronic fatigue syndrome (CFS) causes persistent fatigue (exhaustion) that affects everyday life and doesn't go away with sleep or rest.

  

#### Symptoms of this condition may include:

*   Unusually tired
*   Pain in more than one joint
*   Difficulty concentrating
*   Aching muscles all over body
*   Abdominal pain

Our Health A-Z contains more information on [**Chronic fatigue syndrome**](/condition/chronic-fatigue-syndrome/#symptoms).

[If you are worried about this condition you can try our free AI Symptom Checker here.](https://webapp.your.md/login?utm_source=yourmd&utm_medium=in-article&utm_campaign=your-symptoms)

Fibromyalgia
------------

Fibromyalgia, also called fibromyalgia syndrome, is a long-term condition which causes pain all over the body.

  

#### Symptoms of this condition may include:

*   Unusually tired
*   Aching muscles all over body
*   Stiff muscles
*   Pain in more than one joint
*   Back stiffness

Our Health A-Z contains more information on [**Fibromyalgia**](/condition/fibromyalgia/#symptoms).

[If you are worried about this condition you can try our free AI Symptom Checker here.](https://webapp.your.md/login?utm_source=yourmd&utm_medium=in-article&utm_campaign=your-symptoms)

Conditions related to Pain in more than one joint, Aching muscles all over body and Unusually tired