Hello, I m 24 years old and, during my middle school and all through high school years I was on dance teams. I noticed a couple years ago that when I bend my knees, kneel down, do any exercise with bending my knees or putting pressure on them I hear a weird cracking, almost grinding sound. It s not very painful, although it feels like my knee just gives out at times, and it gets uncomfortable to where I hate working out. Just wondering if thats something that I need to get looked out or if it is just really common since I use to do a lot of dancing. I also notice that its getting worse with age and both knees make the sound but my right knee is a lot worse.