Knee pain can be due to many reasons such as degenerative changes in knee.
Examination is very important for right treatment.
For symptomatic relief you can take yograj guggul -2 BD c with dashmoolarishtam after meal.
Application of vatarin oil is helpful.
Glucosamine again helps in preventing further damage.
Next Steps
please consult with some acupuncturist.
Health Tips
stretching of calf and hamstrings will help if you know how to do it properly.