DEAR DOCTOR K: I saw my doctor because of aching pain in my knee, which sometimes buckles unexpectedly. He says I have chondromalacia. What is this, and what can I do to relieve the pain?
DEAR READER: The joints in your body are cushioned by cartilage. This tough, rubbery tissue covers and protects the ends of bones inside a joint, allowing them to glide smoothly against one another as the joint moves.