Can the patella become out of place?

Patellar Subluxation: The patella can get dislocated. It is called patellar subluxation. A brace can be worn to keep it in place. Exercises and physical therapy can build the muscles surrounding and stabilize it better. If all else fails, surgery is the final step.

Yes: The patella can dislocate or sublux out of its proper tracking.

Yes, it's possible: Most subluxations/ dislocations occur laterally (moves outward), & if this is the case, then i recommend rehab/ physical therapy focusing on medial (inside) musculature to try and counter ligament laxity. There is also a brace that you may find helpful. Before returning to exercises have a x-ray to check for bone or cartilage damage.

Patella dislocation: This is relatively common condition. It can be quite painful and after it is reduced will be sore for a while. A knee immobilizer and physiotherapy can help with the pain and help with recovery. Anti-inflammatories can help with the pain also. You should see your doctor to evaluate the strength of you ligaments and an xray may help.