I have been taking levothyroxine for 20 years now. Not noticed many side effects. However I have started with widespread swelling and pain in various places. Toes, fingers, hands, wrists. All extremely painful to touch and swollen. Rheumatologist thinks it’s a reactive arthritis for a throat infection but all my inflammatory marker blood results are normal. Does anyone know if side effects like these can suddenly happen years after starting levothyroxine?
Thank you in advance