This is a pus-filled swelling in the brain. Most cases are due to infection spreading from elsewhere in the body. Occasionally an abscess results from infection after a head injury.
Although rare, brain abscesses can be life-threatening or cause long-term problems, such as epilepsy or brain damage. Symptoms may include fever, nausea, headache, vomiting, and seizures.
A person with any of these symptoms should seek urgent medical advice. Other symptoms, such as speech or vision problems, may occur depending on the area of brain affected. Treatment is with medication, and sometimes surgery

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