Is it possible for my abscessed tooth infection to spread to my brain?

It is possible. A tooth abscess won't go away without treatment and the infection may spread to your jaw, cheeks, sinus, brain and to other areas of your head and neck. A dental abscess is a collection of pus that forms in your teeth or gums as a result of a bacterial infection. Dentist will treat a tooth abscess by treating the cause and getting rid of the infection. See your dentist ASAP.
Yes. Left untreated an abscess can spread through soft tissue and eventually infect the brain.
Yes, but rare. Please do not wait. Go see your dentist a. S. A. P.