I have tendonitous in my right knee for about 4 years it won't heal what should i do?

See an orthopod: If you haven't yet, would see an orthopaedist to evaluate your knee. He or she may recommend additional treatment.

Physical therapy: This may include taping, topical pain medication and quad as well as core strengthening exercises. A Sports medicine or PMR doctor can establish a clear diagnosis and guide your course of rehabilitation with a Physical therapist.