Knee injuries from table tennis?

[k***@gmail.com]

After playing table tennis I get swelling in knee how to avoid and cure it

[m***@gmail.com]

Is Chondromalacia common among table tennis players? This injury
is also known as runner's knee and tennis knee.

I'm playing table tennis and football also..I have that problem..my left an right knees are pained after and while when I was played that games..what should I do to that problem..??