Osgood-Schlatter disease can cause a painful, bony bump on the shinbone just below the knee. It usually occurs in children and adolescents experiencing growth spurts during puberty.
Osgood-Schlatter disease occurs most often in children who participate in sports that involve running, jumping and swift changes of direction — such as soccer, basketball, figure skating and ballet.
While the condition was once more common in boys, the gender gap has narrowed as more girls have become involved with sports.
Osgood-Schlatter disease typically occurs in boys ages 12 to 14 and girls ages 10 to 13. The difference is because girls enter puberty earlier than do boys. The condition usually resolves on its own, once the child's bones stop growing.