Transient synovitis

Transient synovitis of the hip is a self-limiting condition in which there is an inflammation of the inner lining (the synovium) of the capsule of the hip joint. Transient synovitis usually affects children between three and ten years old. It is the most common cause of sudden hip pain and limp in young children.

The exact cause of transient synovitis is not clear, but it may be triggered by an upper respiratory tract infection. Symptoms include hip pain, limping, and a decreased range of motion in the affected hip joint. The condition is typically diagnosed through a physical examination and medical history, and sometimes an imaging test such as an ultrasound to look for fluid in a joint capsule.

Treatment for transient synovitis typically involves managing the pain and inflammation with rest, ice, and pain medications. Bed rest or limited activity may also be recommended until the symptoms improve.