How do i treat pain inside the knee?

Depends: When you say pain inside the knee you need to be more specific. As in real estate, location, location , location. Is it behind the kneecap? Is it lateral (outside) or medial (inside) ? Is the pain sharp, aching or related to activities ? We need a bit more information before we can help.

Many possibilities: Pain inside the knee can be arthritis of various types, cartilage problems such as tears, ligament injuries. Sometimes a knee can lock which could be cartilage locking, patellar locking or joint mice to name a few. Knee pain can be coming from elsewhere - what we call referred pain from the hip and cause this problem. During your evalaution these among others will be evaluated to clarify.

Define location: Where the pain is coming from directs treatment. Inside the knee is cartilage, bone, synovium, to name few. It can be mechanical or it can be inflammatory. It could be referred from outside the knee like the hip, but the pain is felt in the knee. The location helps direct the treatment. It may be physical therapy, exercises, medications or even surgery.