Painfull knees a symptom of overactive thyroid?

I have Grave's-Basedow Disease, which is a type of hyperthyroidism and I have never had pain in my knees. I have exceptionally weak limbs like yourself though due to wasting before I was diagnosed. I would say that it is due to something else. The only thing you get from a thyroid disorder on your knees are these red spots that are small and don't hurt and hardly and sufferers get them either.