What Does Visible Deformity After Injury Feel Like With Patellar Dislocation?

A patellar dislocation happens when the kneecap moves out of its usual track at the front of the knee. You may notice a lopsided or prominent shape, a sensation that the knee has given way, and tenderness around the kneecap. Swelling can develop, and straightening the leg may feel restricted. The kneecap can sometimes move back into place before you are examined, but pain, swelling, or a feeling of looseness may remain. Similar deformity can occur with other injuries, so appearance alone cannot identify the cause.

Stop the activity and keep the leg still in the position that feels most comfortable. Do not try to force the kneecap back or repeatedly test the joint. Support the leg, use a wrapped cold pack for short periods, and avoid putting weight on it if walking is painful or the knee feels unstable. Arrange prompt medical assessment so the joint, bones, circulation, and nearby tissues can be checked.

Seek emergency help if the knee remains visibly out of place, pain is severe, the foot becomes cold or pale, or you develop numbness or marked weakness. Urgent assessment is also appropriate after a major fall or collision, or when you cannot move the knee safely. Do not drive yourself if the leg cannot be controlled.

Ask whether the kneecap is still displaced, whether imaging is needed, and which movements or weight-bearing limits apply. You can also ask how swelling should be managed, when rehabilitation may begin, and which symptoms should prompt a return visit.