Good Afternoon, Doctor, My Wife Is Under Thyroid Treatment And

good afternoon, doctor, my wife is under thyroid treatment and she is taking 25 mcg thyronorm now. In January TSH level shoot up to 10 and in Feb, 6.8 and in Mar 3.9 which is under control now. two-three weeks back she made 108 rounds to a holy tree and after that she got giddiness and after couple of hours rest at home she became normal but lately muscle pain is developed in the neck and legs and her energy levels are coming down by evening. she is not able to sit for long time and not able to walk some times. she is now on rest most of the time. what are the possible reasons for this pain and how do we cure it