Patellar tendonitis, generally known as jumper’s knee, influences the tendon connecting the kneecap to your shinbone. It's common amongst athletes which include badminton gamers.  Bracing: A knee brace can offer help and steadiness, especially for folks who would like to stay away from surgery or have healthcare motives blocking surgery. https://www.theorthopaedicandpainpractice.com/what-happens-if-i-injure-my-posterior-cruciate-ligament/