Unless you have a full range of natural movement, with a body free of tension and pain, you will have your own unique individual trauma imprint. This trauma imprint is created by the formation of physical restrictions within your body-wide web of connectives tissues as a response to inflammation, leaving a record of the stress and damage your body has experienced over the years.
The body's inflammatory processes are complex and can initiated by many things.
→ Injuries, accidents, abuse, surgery. Infections (bacterial, viral etc.). Stress, fear, the things that make us tense, flinch, freeze-up. Awkward positions, shocks, strains, exertions, slips, falls. The list goes on.
Anything that triggers inflammation will generate 'sticky' connective tissues, and, if not released through movement, these sticky tissues become 'stored trauma' and part of your trauma imprint.
Your unique trauma imprint is responsible for your particular collection of pain-related symptoms.
This is why everyone's experience of the symptoms of fibromyalgia are a bit different.
I have only a case study of one (me!) and the body's interconnectedness is far too complicated for me to describe - subject to almost infinite variables but I believe there will be common trends and patterns depending on the location of the 'primary' restrictions on your body. - past injuries etc.
From a long list of symptoms (all with varying severity and time-scales) there are countless combinations that give you your individual group of clinical signs.
Signs and symptoms occur along damaged and restricted threads. These trends are what I believe are the basis of TCM. Physicians describing patterns observed over how many years? How many patients? I'd guess at many hundreds of years, thousands of patients...
Whatever your individual trauma imprint is, the fix is the same. Connect with your learn to heal yourself by developing your sense of Your body. Your pain. You can fix it.