What should you know about patellar dislocation subluxation?

A subluxation means the kneecap moves partly out of the track at the front of the knee and then may slide back. A full dislocation moves farther out of position. Both can strain the tissues that guide the kneecap, and repeated episodes can make everyday turning, stairs, or sport feel uncertain.

Symptoms may include a sudden shift, front-of-knee pain, swelling, clicking, or the sensation that the knee will buckle. An examination looks at alignment, movement, strength, and tenderness. Imaging may be used to assess bone shape or an injury inside the joint.

Pause the movement that caused the slip and use comfortable, supported motion. Avoid twisting, deep squats, and jumping until control improves. A brace may be recommended for selected activities, but fit and duration should come from a clinician.

Physiotherapy commonly targets quadriceps activation, hip strength, balance, and movement technique. The plan should progress from controlled exercises to the tasks that trigger symptoms. If episodes continue despite appropriate rehabilitation, an orthopaedic specialist may discuss stabilising surgery such as [MPFL Reconstruction](/treatments/sports-and-arthroscopic-surgery/mpfl-reconstruction/).

Arrange an assessment for repeated slipping, persistent swelling, pain that limits walking, or a knee that repeatedly gives way. Seek urgent care if the kneecap is visibly displaced, the knee locks, you cannot bear weight, or the foot becomes numb, pale, or cold after an injury.

Ask whether the episode was a subluxation or full dislocation, whether the kneecap alignment needs imaging, and which brace or exercises fit your situation. Clarify how to return to stairs, running, or sport and what recurrence would require further review.