Osgood-Schlatters is the common cause of knee pain in growing adolescents. It is caused by the pull of large muscles in your thigh (quadriceps) placing excess strain the growth plate of the shin bone (tibia). It causes pain, tenderness and swelling just below the knee, and down the shin.
More common in boys experiencing a growth spurt during their pre-teen or teenage years. Typically occurs after activities with large amounts of running and jumping – such as football, basketball or gymnastics. Poor lower leg biomechanics and overload/imbalance of certain lower limb muscles can contribute to development of Osgood Schlatter’s.