Patellar Tendonitis or Jumper's Knee
Source: Verywell Health
Patellar tendonitis is the condition that occurs when the tendon becomes inflamed and irritated. This problem is most often seen in athletes who do repetitive jumping, the reason patellar tendonitis is often called "jumper's knee." Patellar tendonitis is most often seen in participants of sports such as basketball and volleyball, although it can also be seen in runners and other types of athletes.