Patellofemoral arthritis affects the underside of the patella (kneecap) and the channel-like groove in the femur (thighbone) that the patella rests in. It causes pain in the front of your knee and can make it difficult to kneel and go up and down stairs.| orthoinfo.aaos.org
If you break a bone in your leg or foot, have a procedure on your knee or lower leg, or suffer a stroke, your doctor may recommend that you use a walking aid while you are healing or recovering. This resource offers tips on using crutches, a cane, or a walker safely.| orthoinfo.aaos.org