There is a lot of debate as to whether there is such a thing as "secondary" fibromyalgia due to some sort of trauma. Often, the trauma is the result of a fall, or a car accident. Such "post-traumatic" fibromyalgia patients are more severely affected, with more pain, and are therefore more difficult to treat.
Fibromyalgia may take many weeks to fully develop after a trauma. One theory holds that pain spreads from one region (for example, the shoulder after a fall) to the rest of the body. ...

