Cause: Many repeated loads or one violent load can cause an inflammation of the synovial membrane (synovitis), fluid formation, swelling, restriction of movement and pain in the hip joint. The condition is relatively often seen in children (Ultrasonic image).
Symptoms: Pain in the joint upon movement with load. Often there will be movement restriction with rotation of the hip joint.
Examination: It will often be necessary to supplement the ordinary clinical examination with an ultrasound scan, where the fluid in the hip joint can easily be seen (Ultrasonic image).
Treatment: The treatment primarily comprises relief from the pain inducing activity until the swelling has abated. Rehabilitation, within the pain threshold, can subsequently be commenced. In cases of lack of progress with relief the treatment can be supplemented with a medical treatment in the form of rheumatic medicine (NSAID) or by drainage of the joint fluid and the injection of corticosteroid, which should be done with ultrasound guidance.
Complications: In particular you should consider a bacterial infection in the joint (pyarthron), which is determined by ultrasound guided draining of the joint fluid, the child hip diseases (epifysiolysis capitis femoris and Calvé-Legg-Perthes disease), where the joint head on the femur slips or collapses (X-ray examination will determine the diagnosis), arthritis or:
Special: There are two childrens’ hip diseases that should always be considered in children with hip pain.