Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooPatellofemoral Pain Syndrome

Knee

What It Is

Line drawing of the knee from the front and the side, showing the kneecap held between the quadriceps tendon above and the patellar tendon running down to the shin bone.
The kneecap glides in a groove at the end of the thigh bone, and how smoothly it does that depends a lot on the muscles pulling on it.

Patellofemoral pain syndrome (PFPS) is pain at the front of the knee, around and behind the kneecap. It is common in people who play sports, such as runners, jumpers, cyclists, skiers and football players, but it also happens in people who are not athletes (AAOS, n.d.; St George's University Hospitals NHS Foundation Trust, 2026).

Many factors can contribute to this condition. These include overuse, sudden increases in activity, unsupportive footwear, problems with the alignment of the kneecap, and weakness, tightness or imbalance in the thigh and hip muscles (AAOS, n.d.; St George's University Hospitals NHS Foundation Trust, 2026). A less common cause is an injury such as a fall onto the knee (St George's University Hospitals NHS Foundation Trust, 2026).

PFPS can come from irritation of the soft tissues around the front of the knee. Other factors include poor training technique or equipment, changes in footwear or playing surface, and muscle imbalance (AAOS, n.d.).

PFPS is sometimes called "runner's knee" (AAOS, n.d.). It is different from iliotibial band syndrome, which causes pain on the outside of the knee. PFPS can cover a range of problems, but they all tend to cause pain at the front of the knee.

PFPS is typically an overuse condition, with people noticing the pain after doing too much, or after a sudden change in how often, how long or how hard they train (AAOS, n.d.). It may affect long-distance cyclists, or runners who regularly overload their body.

Patellofemoral Pain Syndrome Anatomy

There are lots of structures around the front of the knee that can cause pain. One of the most common sources is the area around the patella (kneecap). The main muscles in the thigh, known as the quadriceps, connect into the kneecap through the quadriceps tendon. There is also a strong tendon below the kneecap, the patellar tendon, which attaches to the tibia (the shin bone). Around the kneecap is a sheath known as the patellar retinaculum, which helps to keep the kneecap stable. Just below the kneecap is a small pad of fat, and the joint is lined by a thin tissue called the synovium; these soft tissues can become irritated and painful (AAOS, n.d.).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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