Tests and diagnosis

By Mayo Clinic Staff

After experiencing a febrile seizure, your child will likely have:

  • A physical exam
  • Blood tests
  • Urine tests

These tests can help determine possible causes of the fever and seizure.

If your doctor suspects a central nervous system infection, a lumbar puncture (spinal tap) may be necessary. In this procedure, a doctor inserts a needle into your child's lower back to remove a small amount of spinal fluid. This test can reveal evidence of infection in the fluid that surrounds the brain and spinal cord.

Further tests such as an electroencephalogram (EEG) — a test that measures brain activity — may be necessary if your child had a complex febrile seizure.

Jan. 24, 2012