a few years ago I had arthroscopic surgery on my right need and a couple months ago as I was running up the stairs to class (I am 23 years old) I felt a pop and a quick sharp pain in the outer part of my knee. Since that incident I have had a constant dull pain and numbness around that side of my knee and some pain around the back of my knee. Could it just be scar tissue, or could it be something more?
Welcome to Chat Doctor I have gone through your query and understand your concern. You may have got some ligament injury or meniscus injury. You have to visit Orthopedic for clinical examination. Till then, you will be benefitted by qua Chat Doctor.  You can take analgesic such as ibuprofen for pain relief. Vitamin B and C help in healing. You can discuss with your doctor about it. Hope your query get answered. If you have any clarification then don't hesitate to write to us. I will be happy to help you. Wishing you a good health. Take care.