Osgood-Schlatter's disease can cause a painful bone shock on the tibia below the knee. It usually occurs in children and adolescents who experience growth spurts during puberty. Osgood-Schlatter disease occurs most often in children who participate in sports involving running, jumping and quick changes of direction, such as football, basketball, figure skating, and ballet. Although the disease has become commonplace among children, the gender gap has narrowed as more and more girls are playing sports. Osgood-Schlatter's disease usually occurs in children 12 to 14 years old and girls 10 to 13 years old. The difference is that girls enter puberty sooner than boys. The disease usually disappears as soon as the child's bones stop growing.