toxic synovitis is an irritation and swelling of the lining of the hip joint. the condition causes pain and tenderness that may move down to the thigh and knee; it sometimes makes a person limp.
toxic synovitis is the most common cause of hip pain in children. it typically occurs in children between the ages of 3 and 8 years. toxic synovitis happens more often in boys than in girls. it commonly follows a mild injury or an illness with a fever, such as tonsillitis or an ear infection.
this condition usually resolves on its own, but treatment may be given for pain and inflammation.
toxic synovitis is also called transient synovitis.