Had pain in left thumb nuckle joint 4 several weeks now it aches most of the time but wen i move it, it really hurts it feels warm inside but not to the touch & the pain seems to be getting worse rather than better not banded it shud i see my gp?

With the limited information it could be arthritis, septic joint, or a tenosynovitis. Most likely some form of overuse injury vs wear and tear. Suggest seeing a gp so further history and physical can determine underlying cause. May need x ray, in the mean time try some conservative treatments( rest, ice, nsaids(if no hx of stomach ulcers, kidney disease, etc) otherwise Tylenol.