My knees pop why?
Answers:
*Popping knees* is fairly adjectives in childlike people and adolescents, but can come about at any age. See a doctor if it continues to bother you.
I found this: ( sites listed below)
** If you don't recollect a specific event (like stepping off a curb or into a hole, twisting your knees and hearing a pop), and you're not have any pain, what you're experiencing may be everyday wear-and-tear. This means the gradual wearing down of the cartilage (the meniscus) that cushions the knees. The rough edges of micro-tears rubbing against each other can raison d`¨ētre that noise, as can minute pieces of cartilage that enjoy broken away and are floating in the knee medication. **
It is the water surrounded by them.