Meningitis is an infection or inflammation of the membrane and fluid around the brain and spinal cord. Viral meningitis is caused by a virus. It may start as another illness, such as the stomach flu. It most often happens in children younger than 5 years of age. It's not the same as bacterial meningitis, which is a serious illness caused by bacteria. Bacterial meningitis needs to be treated with antibiotics right away. Viral meningitis is often mild and less serious, except in infants younger than 3 months and with certain viruses, such as herpes simplex. It will go away with no treatment.

Viral meningitis isn't an emergency. But the symptoms are often the same as bacterial meningitis, which is a more serious condition. You won't know which one your child has, so it's important to get medical care right away if your child has any of these symptoms:

• Fever over 100.4°F ( 38.0°C) (in a baby less than 2 months of age)
• Severe headache that doesn't go away
• Stiff neck (arching back or neck in infants)
• Upset stomach (nausea) or vomiting with headache
• Sleepiness and trouble waking up
• Grouchiness and dislike of being handled
• Bruise-like rash or splotchy skin
• Sensitivity to light
• No appetite

Note: If a newborn or infant is grouchy, very sleepy, or eats poorly, have them checked by a doctor right away. Have them checked even if there's no fever.

Tests are done to diagnose meningitis. The tests can show if it's bacterial or viral. The tests include:

• Spinal tap. A sample of spinal fluid is taken from the spinal canal located in the lower back. It's checked for signs of bacteria or viruses. This is the main test for meningitis.
• Imaging tests. These may include an MRI or a CT scan. These tests look for areas of swelling and inflammation.

Viral meningitis often goes away on its own in about 10 days. Medicines may be used to treat the symptoms linked to viral meningitis, such as headache or pain medicines, anti-nausea medicines, or I.V. (intravenous) fluids. These are to help keep your child more comfortable. Depending on the cause of your child's viral meningitis, the doctor may prescribe certain antiviral medicines. When your child has recovered, follow-up care with the doctor is important to check for problems with vision, hearing, movement, and mental function.