I was diagnosed with Osgood-Schlatter disease at 12 or 13. At 17, woke up one day after a school dance, and couldn’t bend the knee.
A bone chip got pulled out into the joint for about a week.
Had to have it surgically removed. The roughly 4-6 week recovery was worse than the few days in the hospital.
I have this, got it in high school track. It varies in intesity and severity. Some people just get a bump growth under the knee and running hurts for awhile. Some have a more serious issue dvlop.
I also had it at 12-13. A lot of kids in the neighborhood had it. Of of my coaches sent many of us to the same Brooklyn Orthopedist. All of us had Osgood Schlatters and all of us had one thing in common. We all played multiple sports in the city parks, which were concrete.
Next season we moved the touch football, basketball, baseball programs to better facilities. Touch football became tackle on the high school field and fast pitch softball became hardball on the same field. Basketball moved into the gym.