In recent times, my research and experimentation has led me to explanations and treatments that focus on the fascia, and whilst I've not yet achieved full recovery (a recovery time of several years is par for the course with these kinds of issues), this approach does seem to be helping to improve my conditions.
The approaches I've been undertaking include yoga/pilates-type stretching exercises and specific types of massage that seek to break up fascia "adhesions" [1].
I'm being careful not to make any specific claims of diagnoses or remedies, as I'm fully aware from my own experience (and background as a scientifically-minded person) that this this whole topic is nascent in terms of solid scientific evidence, and rife with pseudoscience.
But it does seem clear to me that there is "something there", and that more research into this topic could likely lead to explanations and remedies for conditions like "chronic pain" and "chronic fatigue", which many people currently endure for years or for life without understanding or relief.
[1] It's not the only work I've been doing; as I've written about here before, diet, cardio exercise and emotional work have all been part of my regimen for some years, but since introducing the practices that focus on fascia, my condition has improved faster and in different ways.