Osgood-Schlatter disease is an overuse condition or injury of the knee that causes a painful bump and swelling on the shinbone below the knee.
Osgood-Schlatter disease typically affects kids during their preadolescent growth spurt: in the tweens (10 to 13) for girls and the early teens (12 to 14) for boys. At this stage, a child’s bones are typically growing faster than the muscles and tendons. As a result, the muscles and tendons have a tendency to become tight.
The condition is caused by the constant pulling of the patellar tendon on the area below the knee where the tendon attaches and is common in tween or teen athletes who play games or sports that involve running, jumping, or going up and down stairs. It is also common among athletes involved in football, soccer, basketball, gymnastics, or ballet.
Factors that increase the likelihood of Osgood-Schlatter disease include:
- Tight quadriceps (front thigh) muscles
- Tight hamstrings (back thigh) muscles