What causes Osgood-Schlatter disease?
Doctors think that the pull of the large powerful muscles in the front of the thigh (called the quadriceps) is what causes Osgood-Schlatter disease. The quadriceps join with the patellar tendons, which run through the knee and into the shin bone, to connect the muscles to the knee. When the quadriceps contract, the patellar tendons can start to pull away from the shin bone, causing pain.
Activities that require running, jumping or going up or down stairs can make the pain worse. Osgood-Schlatter is most common in young athletes who play football, soccer or basketball or are involved in gymnastics and ballet.
Written by familydoctor.org editorial staff