Meningitis is when the protective membranes around the brain and spinal cord begin to swell. It's usually caused by a bacterial or viral infection, though can also be a result of an injury or certain drugs. Meningitis treatment depends on the cause of the swelling and can vary based on the diagnosis.

Meningitis Basics

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Meningitis Overview
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Signs and Symptoms of Meningitis

Explore Meningitis

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What Is Meningitis?
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Bacterial Meningitis Can Be Life-Threatening—What to Know About Causes, Symptoms, and Treatment
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What You Need to Know About Meningitis