Toxic Synovitis of the Hip in Children
Medically reviewed by Drugs.com. Last updated on May 4, 2025.
AMBULATORY CARE:
Toxic synovitis of the hip
is swelling of your child's hip joint. The swelling usually develops after a viral infection or trauma and does not spread to other areas. Toxic synovitis of the hip can occur at any age but is most common in children 3 to 10 years old.
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Common signs and symptoms of toxic synovitis of the hip:
- Sudden pain in the hip, upper leg, or knee
- Pain that causes your child to limp when he or she walks
- Limited leg and hip motion
- Sitting or lying with the legs apart in an unusual position
- A fever of 100ºF (37.78ºC) or lower
Seek care immediately if:
- Your child's symptoms get worse.
- Your child cannot put any weight on his or her leg.
- Your child's fever is higher than 100ºF (37.8ºC), or as directed by a healthcare provider.
Call your child's doctor if:
- Your child's symptoms do not improve within 3 weeks on their own, or within 2 days with medicine.
- You have questions or concerns about your child's condition or care.
Treatment
is usually not needed. Toxic synovitis may go away on its own within 3 weeks. The following can help you manage your child's condition:
- Rest and limited leg movement may help your child improve more quickly. Your child may also be told to keep weight off his or her leg until pain is reduced.
- Medicines may be needed to treat pain or a bacterial infection.
Follow up with your child's doctor within 2 days, or as directed:
Write down your questions so you remember to ask them during your visits.
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