Tissue growing over bone or cartilage.
What Causes Knee Pain It Feels Like It Is Really Tight When Squatting And Pops Frequently - Mild To Moderate Pain When Sitting Standing And Climbing Steps
Pops when roller skating
This happens to me frequently. It feels like it has to pop, and usually does, in order for it not to feel as tight or painful...then I get this feeling that is similar to if you were squeezing your knee cap. My advice bend your legs back and forth until the pressure builds up and pops or stand up and your knee with your foot firmly held still and gently twist your leg until it loosens or pops.