Fibromyalgia is pain affecting “fibrous” connective tissue and muscle – myo being from muscle.
Myofascial pain – is muscle pain – myo and fascia pain – also connective tissue
Simply explained – it’s far more complicated – is that fibromyalgia is often in people who have a genetic predisposition to pain and myofascial pain is some area of the body – rather than widespread pain – that occurs usually from trauma / repetitive trauma or ageing – degeneration
if you have fibromyalgia then routine is your friend. Get up the same time every morning and go to bed same time every night. You may notice that any change in routine causes increased symptoms – even a happy holiday can mess with fibromyalgia. Keep to same healthy diet, exercise should be moderate – don’t overdue it. No marathons or breakdancing.
Not everyone agrees on the cause(s) of fibromyalgia. Here is one explanation.
Fibromyalgia can be explained : Arthritis Society Canada
There are alternative views about fibromyalgia and many questions. Below is another point of view.