Schlatters knee, also known as Osgood-Schlatter disease, is a painful enlargement of the tibial tuberosity, the bump below the knee on the shin bone. It occurs most often in children and teenagers during growth spurts due to repetitive pulling of the patellar tendon during activities like running and jumping. Symptoms include pain and tenderness below the knee that usually resolves within 6 to 24 months as skeletal maturity is reached. Treatment focuses on rest, ice, compression, and anti-inflammatory medications or bracing to aid healing.