Chronic pain that's diffuse, multi-site, sometimes migratory
Duration > 3 months
If there's a precipitant (e.g. accident or injury), may seem relatively mild
Pain can wax/wane
Often paresthesias/neuropathic quality
Can be provoked by light contact (e.g. clothing)
Often joint pain, disordered sleep
Often profound fatigue
May have neuro-psychiatric symptoms including anxiety, depression, difficulty w/memory, sense of fogginess
Related sx can include ha, depression, dysmennhorea, fatigue, TMJ, IBS, neck and back pain
Can occur concomitant w/RA, OA, other inflammatory d/o
Patient self report multi-site pain; can use body chart, Widespread Pain Index (WPI), Symptoms Severity Score (SSS) to assist w/dx - as the diagnosis is based on clinical grounds (history and exam), as well as labs/imaging to exclude other diagnoses (ie there are no labs/imaging to confirm the diagnosis of fibromyalgia)
Physical Exam Findings
No structural abnormality or inflammation to explain sx
Sometimes diffuse tenderness on palpation, even w/light pressure