Hi there!
Well, without an evaluation it would be difficult to determine the cause of the knee pain. Possibilities that may need to be considered include patellar dislocation, chondromalacia patellae, infections/ inflammations, arthritis, bursitis, tendonitis, cyst formation, iliotibial band syndrome, osgood schlatter disease, bone growths/ tumours, nerve impingement/ compression, fractures, injuries to the internal knee ligaments/ menisci, osteopenia, micronutrient deficiencies etc.; just to name a few. While a few of these can be ruled out on the x-ray, most others would require further evaluation. I would suggest consulting an orthopedician for an evaluation, preferably at a university/ teaching hospital. After a cause is diagnosed, it can be managed accordingly.
Hope this helps.
Take care!
thank you very much sir...
i will work on that.