If your knees crack without any pain, it's probably nothing to worry about. However, if there's persistent pain, it's a good ...

If the snap, crackle, and pop coincide with pain, swelling, joint instability, something moving around inside the knee or the knees locking out, it could be a sign of something more serious. Folks ...

See what happens inside your knee when this ligament overstretches and tears. Is that cracking and popping normal? Know how many knees dogs have? Find out the answers to these and other questions ...