Nine months ago I started to experience sever muscle and joint pain primarily in my knees, right arm, and stiffness in my fingers. It feels like arthritis. I started seeing an endocrinologist and have been on several different thyroid medications including Armour thyroid medication. No improvements on any medications. Endo sent me to a rheumatologist to rule out other issues. All tests were negative. Does anyone have suggestions for treating inflammation due to thyroid medication? At this point I think that's my only option. Endo is at a loss and claims to have not seen this problem before. Thank you!