Based on the available information provided by you,it seems you are experiencing early changes degeneration of knee cartilage.However,other causes of knee pain need to be ruled out by detailed history and physical examination to arrive proper diagnosis.
Next Steps
Visit nearest hospital for orthopaedic consultation or contact me for online consultation.
Health Tips
1) Active Joint Range of Motion exercises.
2)Watch for increased pain/swelling/Stiffnees/Redness/Fever.If present, visit nearest hospital immediately.
3) Avoid ground level activities like squatting and cross legged sitting.
4) Avoid sleeping on floor,Use western toilet.