Synovitis is a multifaceted disease that develops mainly in the knee or hip joint. The main symptoms of synovitis are joint swelling, followed by pain and dysfunction. Here is how to treat synovitis in children. First, conservative treatment, not to keep sitting in one position for a long time, not to engage in physical activities for a long time, and to control the amount of exercise they do every day. The cause of synovitis in young children is not yet clear and is most likely caused by excessive activity in the child. Parents of children with synovitis should be careful to give their children plenty of rest, especially during the onset of the disease, so that the pressure inside the joints is reduced to prevent ischemic necrosis of the bones. To relieve pain, parents can give their child appropriate anti-inflammatory and pain relieving medications, and in severe cases, skin traction and braking of the affected limb can be used for joint physical therapy to reduce the swelling of the child’s joints. If the child’s synovitis has become chronic and there is a lot of fluid in the joint, active fluid extraction can be very effective in relieving the symptoms and preventing the joint function from being affected. First, a joint ultrasound should be done to see if there is fluid. If there is a lot of fluid, the synovial fluid can be punctured for routine, biochemical and bacterial culture and drug sensitivity tests, because most of the fluid in the joint cavity is secreted by the synovial membrane, and these tests can basically determine whether the fluid is infectious or non-infectious. In daily life, children should do some functional exercises to strengthen their own immune system. The child’s diet should avoid spicy and stimulating foods, seafood and other foods that can cause allergic reactions should also be avoided as much as possible. Parents should be careful not to expose their child’s joints to cold and dampness, and to keep the joints and soles of the feet warm. If your child has symptoms similar to synovitis, parents should pay enough attention and go to the hospital in a timely manner to avoid blind treatment and miss the opportunity to treat the child with serious consequences.