Thanks you for your question and sorry to hear about your knee pain. There are many different causes for knee pain but a common problem in your age is something called patella-femoral pain syndrome. This is usually from a relative muscle imbalance and hence the phenomenon of mal-tracking and pain.
In general this can be resolved with rehabilitation - but it would be important for you to seek a formal assessment with investigations if appropriate.
I would suggest visiting a Sports/MSK physician or physiotherapist in the first instance. They can evaluate your knee and advise accordingly. Of course there maybe other causes that are uncovered during your consultation.
I hope this helps.
Bw
Dr Dinesh
