The causes of<unk>  are not fully understood. The onset is often insidious with reports of a "non-painful" sensation or audible<unk> , clicking, or popping with certain activities. Individuals often ignore the<unk> " sensation, which may lead to future discomfort with activity. Athletes appear to have an increased risk of<unk>  due to repetitive and physically demanding movements. Among athletes such as ballet dancers, gymnasts, horse riders, track and field athletes and soccer players, military training, or any vigorous exerciser, repeated<unk>  flexion can lead to injury. In excessive weightlifting or running, the cause is usually attributed to extreme thickening of the tendons in the<unk>  region.<unk>  most often occurs in people who are 15 to 40 years old. Extra-articular Extra-articular<unk>  is commonly associated with leg length difference (usually the long side is symptomatic), tightness in the iliotibial band (ITB) on the involved side, weakness in<unk>  abductors and external rotators, poor lumbopelvic stability and abnormal foot mechanics (overpronation). Popping during external<unk> <unk>  (lateral-extra articular), occurs when the thickened posterior aspect of the ITB or the anterior gluteus maximus rubs over the greater trochanter as the<unk>  is extended. Internal<unk> <unk>  (medial-extra articular) is usually described by the patient as a<unk>  or locking of the<unk>  with an audible snap and occurs when the iliopsoas tendon snaps over underlying bony prominences. Almost half of patients with internal<unk> <unk>  also have inter-articular pathology. Intra-articular The causes of intra-articular<unk>  seem to be broadly similar to those of the extra-articular type, but often include an underlying mechanical problem in the lower extremity. The pain associated with the internal variety tends to be more intense and therefore more debilitating than with the external variety. Intra-articular<unk>  is often indicative of injury such as a torn acetabular labrum, ligamentum teres tears, loose bodies, articular cartilage damage, or synovial chondromatosis (cartilage formations in the synovial membrane of the joint).
Snapping hip syndrome
Facet syndrome
Heel pad syndrome
Milwaukee shoulder syndrome
Patellar subluxation syndrome
Infrapatellar fat pad syndrome
Iliotibial band syndrome
Back strain