hi welcome to Health care magic forum.
From the description it appears that you are over weight, and have thyroid cancer
, had head injury
, now you have left sided pain, and shoulder pain
As you had thyroid cancer, there might be metastasis of the cancer cells to any part of the body like shoulder, back bone etc.
The obacity also may be one of the causes of sedentary life.
I advise you to follow some non medical procedures for the relief, like yoga
, reading books, hearing music, etc for diversion from the agony.
Wishing for a quick and continued recovery, and thanks for choosing H.C.M.F.