My mom has fibromyalgia. She has been through physical therapy twice for injuries. I have seen her sleep 16 hours in a day after going out the day before. I have seen her be up most of the night in too much pain to sleep. There is a chemical released by the nerves I think that indicates pain, called by at least some "substance P." This substance is elevated in the blood of those with fibro. Also, some have found that at least some people with fibro have had actual nerve growth/activation. My mom's desensitized finger where the nerve got slashed years ago is more sensitive again than it initially was. Fibromyalgia is very real. It may also be linked, along with chronic fatigue, to stealth viruses. There is some research that was going on with this as well as some genetic predispositions that may occur In order for a person to be diagnosed with fibro, they MUST have some 10 or 15 trigger points of a set of specific trigger points with muscle spasms and reactions. It is not just in your head. It's in your whole nervous system. God have mercy on those who have it and keep those of us without fibro from ever having it.
You want a physicians answer, she has fibro. You want a thinker's answer, something is not right with her/her body. You want a daughter's observation, my mom has not been able to have a normal life for years, is often in pain, and takes pain medication more often than anyone should have to. You can philosophize reality as much as you want, but this is the reality that we live in. How much more real do you need?
Fibro is as real as chronic fatigue, which is as real as migraines, which is as real as chemical sensitivities, which is as real as asthma. I would be happy to elaborate on any of these if their realness is in question.