A condition affecting the tibia’s tuberosity just below the kneecap, Osgood-Schlatter’s disease is often seen in early teenagers, with boys being more commonly affected than girls. Symptoms include pain and swelling, which intensify post-exercise, tenderness at the upper part of the tibia, and sometimes a sensation of warmth. While passive movements might not hurt, active extension can cause discomfort. This ailment, which might last anywhere from a few months to a couple of years, tends to resolve on its own without any treatment. In many instances, there’s no need to even limit physical activities. The condition is likely due to the strain the patellar ligament places on a still-developing bone during intense physical activities like football.