From the description of the pain you have mentioned it seems to be an epicondylitis, more commonly called as " tennis elbow ". You need to consult an orthopaedic surgeon, and confirm the diagnosis and try to find out the cause for this problem. As you have mentioned pain in other joints too, you need to be evaluated further with xrays and blood tests. If it is tennis elbow due to overuse, you need to do regular stretching exercises, then strengthening exercises which a physiotherapist would guide you, if pain is persistant, other options like ultrasound, bracing, taping, injections can be tried.