OSD Full Form in Medical term is Osgood Schlatter Disease. This medical condition causes swelling and pain at the bottom of the knee joint, where the patellar tendon attaches to the top of the tibia/shinbone, called the tibial tuberosity. The leading cause of OSD is the overgrowth of the bone plate due to irritation. Most young athletes who usually do running or jumping can have OSD. Sometimes it may be treatable with simple measures, including ice, rest, OTC medication, strengthening exercises, and stretching.
Signs and symptoms of Osgood Schlatter’s disease are brought on by jumping, running, and other physical activities. While in some cases, symptoms like swelling of the tibial tubercle, knee pain and tenderness in the tibial tubercle, and tightness of the muscles at the front or back of the thigh are seen.
OPC disease often occurs during a growth spurt, when muscles, bones, other structures, and tendons rapidly change. Because physical exercise and activity put more pain and stress on muscles and bones, children who play sports are at increased risk for the condition.
Source: allacronyms.com/OSD/medical