Transient synovitis (TS) is irritation and swelling (inflammation) in a child’s hip joint that usually lasts 1 to 3 weeks. It can also affect other joints.
It may also be called toxic synovitis or irritable hip.
The exact cause of TS is not known. It most often starts after a child has a viral infection. Sometimes it happens after a child gets a vaccine or takes certain medicines. Sometimes no cause can be found.
Symptoms may include pain and limping. Some children with TS also have a skin rash.
Your healthcare provider will ask about your child’s symptoms and medical history and examine your child. Tests may include:
Your child may have tests or scans to check for other possible causes of the symptoms.
TS is usually treated with anti-inflammatory medicines.
Your healthcare provider may recommend prescription or nonprescription medicine, such as ibuprofen, or naproxen. Nonsteroidal anti-inflammatory medicines (NSAIDs), such as ibuprofen, naproxen, and aspirin, may cause stomach bleeding and other problems. Read the label and give as directed. Check with your healthcare provider before you give any medicine that contains aspirin or salicylates to a child or teen. This includes medicines like baby aspirin, some cold medicines, and Pepto-Bismol. Children and teens who take aspirin are at risk for a serious illness called Reye’s syndrome.
Follow the full course of treatment prescribed by your healthcare provider. Ask your provider:
Make sure you know when your child should come back for a checkup. Keep all appointments for provider visits or tests.