Toxic Synovitis (Transient Synovitis)
Cause/Symptoms: Toxic synovitis is a temporary condition that causes hip pain in children. It’s also known as transient synovitis. It mainly occurs in children between 3 and 8 years old. It’s two to four times more common in boys than girls.
Toxic synovitis occurs when there’s inflammation in the hip joint. The cause is unknown, but it often occurs after a viral infection. It usually only affects one hip, but it’s possible for swelling and inflammation to spread to other joints.
The most common symptom of toxic synovitis is hip pain. This pain might occur on and off in one or both hips. It might flare up when your child gets up after sitting or lying down for a long time.
Other symptoms include:
- limping or walking on tiptoe due to discomfort
- pain in the thigh or knee and no hip pain
- low-grade fever under 101°F
- refusing to walk if the pain is severe
- crying and irritability in younger children
Toxic synovitis clears up in about one to two weeks in most cases, but it can last as long as five weeks. It can occur repeatedly in some children when they have viral infections like colds.
Your child can return to daycare, once all the following criteria has been meet:
- 48 hours from the time the fever reducing medication are out of your child system (8 to 10 hours after taking last dose) and fever has not returned
- 48 hours free of any fever reducing medication or any other medication that can mask symptoms of illness.
- If no medication is given: 48 hours starting one (1) hour after you discover your child’s fever has broken
- Child can participate in all the daycare activities
- Child's pain is manageable (not getting in the way of participating in all the daycare activities, Isn't constantly in tears due to the pain)
- Child can walk/crawl on his/her own
Be prepared for your child to be home for one (1) week longer