It's commonly known as runner's knee, but you don't have to run to feel the pain of patellofemoral syndrome (PFPS). This condition occurs often in young athletes and female athletes especially.

Patellar tendinopathy happens when the patella tendon that connects your kneecap (patella) to your shinbone is torn or injured. Stress on the tendon causes tiny tears, which are usually small enough ...

Medically reviewed by Amy Kwan, PT Key Takeaways Patellar tendonitis happens when the tendon becomes inflamed and irritated.

If YOU'RE FEELING pain just under your kneecap, you might be dealing with a bout of patellar tendonitis. It's a specific place to feel pain, and if you've ever experienced it, you know all too well ...

Medically reviewed by Oluseun Olufade, MD Key Takeaways Patellofemoral stress syndrome is often called runner's knee or ...