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Tests and diagnosis
By Mayo Clinic staffYour doctor will examine your child to determine the possible causes of the fever and seizure. Your doctor may order blood and urine tests to detect an infection.
If your doctor suspects a central nervous system infection, a spinal tap (lumbar puncture) 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 may be necessary if your child had a complex febrile seizure.
