Hip Impingement | Symptoms and Causes

What are the signs and symptoms of hip impingement?

Signs and symptoms of hip impingement can include:

  • stiffness in the groin or in the front of the thigh
  • inability to flex the hip beyond a right angle
  • pain in the groin during or after the hip has been flexed, such as running, jumping or prolonged sitting

What causes hip impingement?

Hip impingement is caused by the abnormal development of the bones of the hip joint that causes the bones to rub against each other. This damages the hip joint’s cartilage. There are three types of hip impingement:

  • Pincer impingement: This type occurs when the hip socket (acetabulum) bone grows over the rim and rubs against the thigh bone (femur).
  • Cam impingement: This type is caused when the thigh bone is not perfectly round and rubs against the hip socket during certain types of motion.
  • Combined impingement: This occurs when there is a combination of both the pincer and cam impingements.

Hip impingement also can be caused by other conditions, including slipped capital femoral epiphysis (SCFE) and Legg-Calve-Perthes disease.