Hip impingement is another term for femoroacetabular impingement (FAI). In a healthy hip, the ball and socket joint that joins the thigh bone to the pelvis glides smoothly during movement. Sometimes, alignment problems can prevent the hip joint from moving smoothly, causing hip impingement. This is one of the most common hip problems and a primary cause of arthritis of the hip and pelvis.


1. Cam Impingement

Two types of impingement occur in the hip: cam and pincer. Cam impingement occurs when the top of the leg bone, the femoral head, has an abnormal shape that prevents it from fitting into the socket properly. When the hip joint moves,  the femoral head becomes squeezed or jammed in the socket. This usually only occurs during certain hip movements.

hip impingement leg

stockdevil / Getty Images


More on Facty Health


This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.