It's a rule out condition. If everything is normal and you have all the symptoms and they would give you a diagnosis

Usually, you know the cause of your strain or sprain. Fibromyalgia is constant not sure what the cause.

It took me a while to figure it out I've been having joint issues for going on for 12+ years. I was told i had fluid behind my knee caps then runners knee. Then finally earlier this year I had the opportunity to get a bunch of blood work done that ruled out, RA,lupus, etc. The NP I was seeing wanted me back so we looked at a few more things before she officially diagnosed me.