@shinigamiookamiryuu It's really unknown how Fibro forms, to be put simply it's your body sending the wrong signals to your brain telling your body it is in pain (This is only one thing in fibro but a big part of it). Sadly there isn't a easy way to test for Fibro, you have to be tested for many other things before you get to the possible diagnosis but as @xmunk mentioned most doctors don't understand it, some don't even think it is an actual thing.