Other than severe pain, symptoms of fibromyalgia include moderate to severe fatigue, migraine headaches, morning stiffness, insomnia and constipation, according to WebMD. The intensity of the symptoms depends on the time of the day. Factors such as weather changes, inactivity, hormonal fluxes and anxiety may also exacerbate the symptoms.
Fibromyalgia is a condition that causes extensive musculoskeletal pain and fatigue due to changes in the brain's pain signal processing, explains Mayo Clinic. Researchers believe that the disorder is more likely to affect women than men and is incurable as of 2015. Treatment to manage the symptoms includes relaxation, exercises and actions that relieve stress.