<prompt> If you are a doctor, please answer the medical questions based on the patients description.I received an injection in my knee four weeks ago for my OA. It still hurts where the needle was pocked and my knee pain is still there. I am not able to sit for more than 5 hours work requirement is 8, walk for more than a block, and sleep without pain. What should I do  <response>: Hi, As per your case you seem to be having grade 4 osteoarthritis of knee joint. Night sleep disturbance occurs in the advanced stages of osteoarthritis. Intra-articular injection of disco supplements such as Hyaluronic Acid helps in the early stages of osteoarthritis. If your disease is in advance stage injection will not benefit. Hope I have answered your query. Let me know if I can assist you further. 