I've read numerous times it is brought on by an accident, surgery or a life changing shock to your body!! Mine definitely came on from stress caused by WSIB and three unsuccessful surgeries on my shoulders which left me with s huge life change with useless arms! I totally believe these!!

Mine emerged after an extremely stressful and traumatic experience

It can also emerge after pregnany...thinking any physical or emotional stress

I fell whilst working as a midwife resulting in myself having to have surgery.

Fibro occurs often after an injury, stress or an illness. The injury can even be a minor injury. I had injured my back then along came fibro.