Some epidural abscesses can be prevented by effective treatment of the infection that causes it. For example, someone with a sinus infection should finish all prescribed antibiotics.
If the abscess is small and promptly treated, the person may have no long-term effects. If there is extensive damage to the brain, the person may have cognitive impairments, inability to move about as easily as others\ \
If untreated, epidural abscesses may continue to grow. This can put pressure on the surrounding nerves, causing them to lose function. It may also cause the abscess to rupture, spilling its contents into the bloodstream. In any case, the result of an untreated abscess is often death.
An epidural abscess is not contagious, and poses no risk to others.