Osteoarthritis of the knee

Knee osteoarthritis is a condition in which the cartilage that cushions the knee wears away. The only way a person can lower their risk is to maintain a healthy weight and avoid high heels, which compromise the dynamics under the foot and cause the knee to twist and turn in ways it was not meant to. Over time, the protective cartilage wears away.
Aggravated by 
(G) Very specific problems