It seems lately that my right hand and my foot are cold and i don't know why? i take bc powder for migraines and thyroid medicine. imitrex (sumatriptan) as well.

See below: This problem can only be solved by seeing your doctor and being evaluated face-to-face. After a thorough examination, your doctor should be able to tell you what's wrong and what to do about it.

Cold feet: Many patients with thyroid dysfunction also have concommitant adrenal stress. This often results in cold hands and feet. This is known as raynaud's phenomenon.