Bugs in the ear generally do not enter the brain because the human ear has a tympanic membrane, bony septum and other structures, and bugs generally cannot pass through these structures. After entering the human ear canal, the majority of worms will remain in the ear canal because of the presence of the eardrum, and will not be able to advance any deeper into the ear canal. Even if the tympanic membrane is perforated in some patients due to ear disease and the bugs can pass through the tympanic membrane, the bugs will not be able to destroy the bony septum separating the tympanic membrane from the brain, so the bugs will not generally enter the brain after entering the ear canal. After the bug enters the ear, instead of considering whether it may enter the brain, we should guard against the possibility of the bug scratching or biting the skin inside the ear and causing an infection. After the bug enters the ear, you should go to the hospital in time to find a doctor with professional equipment to remove the bug to avoid infection.