4. Abscess in the Brain
An abscess in the brain can sometimes be associated with optic nerve swelling, and this should be considered a very serious health condition that means you should get to the emergency room immediately. There are several conditions and injuries which might cause an abscess to occur in the brain, and these are as varied as including tooth infections which travel up towards the head and closer to the nerves, or a head injury or medical condition (such as a brain tumor) which lead to the abscess occurring.
Symptoms of an abscess in the brain can include high-grade fever, constant infections, headaches, memory loss, nosebleeds and a range of other serious symptoms which might also include papilledema.
This can be easy to treat with a course of antibiotics (sometimes including surgery to relieve pressure), though only if caught extremely early on in the process. Here, an appointment could save your life.