Thanks for writing to HCM
Firstly you need X-ray of your patella
bone in AP/Lateral view. Fracture
should be excluded in your condition.
Fracture patella can be managed conservatively or surgical depending upon fracture.
Undisplaced fracture are managed by cast application for 4-6 weeks.whereas displaced fracture may need partial or total paella removal or tension band wiring depending upon fracture.
Get well soon.