Nerves, muscles, tissues can be inflamed without an official "autoimmune inflammatory disease". That isn't required. There are blood tests for certain things like SED rate which indicate a certain type of inflammation. And ANA which indicate autoimmune. And Rheumatoid Arthritis Factor test which also would indicate a form of inflammation.But there are several other types of tissue inflammation. And they can and do affect nerves. I've injured myself and had the same muscle aches, and anti-inflammatory medications fixed it (NSAIDS / ibuprofen). I'm not saying BFS can be treated with Ibuprofen. But had I gotten those blood tests, I would not show positive for "inflammation". I have another condition called seborrheic dermatitis. Its an inflammatory skin condition. Won't show on a blood test. But it's inflammation. It goes away and comes back in direct relation to how much rest I've had. Or how run down I am. Thinning hair in men is a result of inflammation. Hormones and Androgen Receptors in the male scalp react, creating a localized autoimmune reaction by inflammation, causing the hairs to be rejected by the body more each hair cycle. So inflammation caused by hormones. Alopecia in women (universalis, totalis, etc) is also an auto-immune inflammatory condition that won't show up on a test. But they have very real symptoms.Inflammation may not be the cause of BFS, but at this stage, I think its relevant. The prednisone thing you mention definitely carries weight, but I wonder if prednisone would stop hair loss? Probably not. It's a different type of inflammation. Many have commented, and I have noticed that when I do things that reduce systemic inflammation (by diet, good rest, etc) my BFS symptoms decrease. That is an inflammatory difference. The very phrase "Hyperexcitability of the Nervous System" is saturated with the implication of inflammation.And to complicate things, we don't all have the same condition.