Osgood-Schlatter disease is a condition characterized by swelling of the bump (anterior tibial tubercle) present on the upper part of the tibia, below the knee. It is the most common cause of knee pain in young athletes. Osgood-Schlatter disease affects children participating in sports activities such as football, gymnastics, basketball, and sprinting.
Any sporting activity creates stress over the growth plate, at the top of tibia. A growth plate is a layer of cartilage present at the end of bone which is responsible for bone growth. It affects girls in the age group of 10 to 11 years and boys in 13 to 14 years age group and generally resolves with age.