Infections of the brain, or spinal cord, can result in dangerous inflammation. In some cases, the cause of the inflammation is unknown.

Meningitis is inflammation of the meninges.  The Meninges are three protective layers that lie between the brain and the skull. They are called the Dura Mater, the Arachnoid and the Pia Mater. The meninges cover and protect the brain.

Encephalitis is the term given to an inflammation of the brain itself.

meninges diagram

Inflammation can damage brain cells and their ability to function. This can lead to a wide range of symptoms including a fever, headaches, seizures, changes in  behaviour or confusion. In some cases, inflammation causes injuries to the brain which can be fatal.