Are Knee Caps Meant to Move?

In a normal knee, the kneecap fits nicely in the groove. But if the groove is uneven or too shallow, the kneecap could slide off, resulting in a partial or complete dislocation. A sharp blow to the kneecap, as in a fall, could also pop the kneecap out of place.

Is it normal for kneecap to move?

Injuries from sports, overuse, or trauma can cause the patella to move slightly off and not track properly in the trochlear groove. In most cases, the kneecap shifts to the outside of the leg, but it can also move towards the inside.

Why do knee caps wiggle?

Loose Kneecap

When your kneecap moves more than usual, you have patellar subluxation. Aside from looser tendons and ligaments, you may have this condition if your leg bones have a different shape than normal. For instance, the lower end of your tibia (the large bone in your thigh), contains a v-shaped notch.