Usually, bugs in the ear do not enter the brain.
The human ear is mainly composed of the auricle, outer ear, middle ear, inner ear and other structures, and bugs enter the ear mainly into the outer ear canal. The adult external auditory canal starts from the bottom of the auricular cavity and ends at the eardrum, which can be composed of cartilage and bone.
The cartilage and bone parts make up about 1/3 of the canal and the bone part makes up 2/3 of the canal, which is not a straight tube and can be slightly curved in an “S” shape. Therefore, if a foreign body such as a bug enters the external auditory canal, it can be blocked by the eardrum outside the middle ear, and will not enter the brain.
However, because the ear canal is relatively deep, plus the skin of the external auditory canal is rich in sensory nerves. When the bug moves inside the ear canal, the sensation will be stronger and symptoms such as earache and itching will appear.
Prolonged inflammatory reaction will occur, so if there are bugs into the ear need to cause high attention, timely medical treatment, standardized treatment, do not dig their own ears or inject drugs into the ear, and so on.