Several causes of hip pain include osteoarthritis, iliopsoas bursitis and greater trochanteric bursitis, according to a study conducted by the University of Wisconsin School of Medicine. Diagnostic testing provides a better differential diagnosis.
Osteoarthritis of the hip produces deep, aching pain and stiffness as well as decreased range of motion in the hip, as the study shows. Iliopsoas bursitis presents with deep pain with catching, and it is common in runners. Greater trochanteric bursitis causes pain with pressure that runs down the side of the thigh. Piriformis syndrome is another common condition, and it causes pain in the upper buttocks and can produce sciatica-like symptoms. X-ray imaging can be used to screen out more serious conditions, including osteonecrosis and slipped capital femoral epiphysis.