Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooHip Impingement

Hip & Thigh

What It Is

Hip impingement is a condition where extra bone grows along one or both of the bones that form the hip joint, giving them an irregular shape. Because the bones don't fit together perfectly, they rub against each other during movement, and over time this can damage the joint and cause pain (American Academy of Orthopaedic Surgeons, n.d.).

Also known as femoroacetabular impingement (FAI), the pain is mostly felt in the groin, although it can also be felt towards the outside of the hip (American Academy of Orthopaedic Surgeons, n.d.).

FAI happens because the hip bones do not form normally during the growing years in childhood (American Academy of Orthopaedic Surgeons, n.d.). Exercise does not cause FAI, but people who are very active work their hips harder, so they may start to notice pain earlier than people who are less active (American Academy of Orthopaedic Surgeons, n.d.). Some people have FAI all their lives and never have any problems (American Academy of Orthopaedic Surgeons, n.d.).

It's the deformity of a cam bone spur, a pincer bone spur, or both together, that leads to pain and damage to the joint. When the bones are abnormally shaped, there is little that can be done to prevent the impingement from occurring (American Academy of Orthopaedic Surgeons, n.d.).

Hip Impingement Anatomy

The hip is a ball and socket joint connecting the thigh bone (femur) to the pelvis. The ball is the femoral head, at the top of the femur, and the socket (acetabulum) is part of the pelvis. Both are covered with smooth, slippery cartilage that helps the bones glide against each other. The socket is ringed by strong fibrocartilage called the labrum, which forms a seal around the socket and helps keep the joint stable (American Academy of Orthopaedic Surgeons, n.d.).

As the thigh bone moves into flexion, the ball can pinch against the socket. People with hip impingement may get pain when they bend the hip (as if taking the knee towards the chest), and turning, twisting and squatting may cause a sharp, stabbing pain (American Academy of Orthopaedic Surgeons, n.d.). Pincer impingement is when extra bone extends out over the normal rim of the socket, and the labrum can be crushed under it. Cam impingement is when the ball is not perfectly round, and a bump on the edge of the ball grinds against the cartilage inside the socket. Combined impingement means both types are present (American Academy of Orthopaedic Surgeons, n.d.).

Over time, impingement can lead to tears of the labrum and to the breakdown of the joint cartilage (osteoarthritis) (American Academy of Orthopaedic Surgeons, n.d.).

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

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