why there is a cracking/popping sound whenever I fold my knees? Although I dont feel any pain when it happens but sometimes there is a continuous sensation around my lower patella(the rounded structure) (feel uncomfortable but not painful) which makes me stretch my knees, bend in other direction and I dont feel like keeping it idle - which gives e some relief for some moment? I was a soccer player and later I became couch potato...recently for the couple of years I got my mojo back and hit the road, running, jogging swimming....which feels great and helps me to keep HBP at bay. I am 35yrs old work in IT and regular night shifts... P:S this pain or sensation with popping of my knees is not an everyday affair....it goes away and come back ...kind of like that.....Thank you!