What To Do For The Severe Joints Pain?

Age:40 years Sex:Male Height: 5 feet 11 inches weight: 73 Kgs Medical History: Sir I have hypothyoidism problem so I am on thyronorm 50 mcp tablet daily each. I am also suffering from the joint pain in the left knee for which severe pain is their ( may be arthoarhitis or ankylosing spondylitis ) but no inflammation shall I use oxerute cd 500 mg tablet for the vericose veins treatment in my left legAs I am Lecturer I have to stand for 4 hours daily to teach in the class room I have veins in the lower leg a little swelling so doctor said to use Oxerute for vericose veins for which the pain is in the leg thigh also