Ears play a larger role than you may realize!
There are many connections between toothaches and ear issues, primarily due to the anatomy of the auditory system. Poor oral hygiene, simple pharyngitis, and the habit of grinding teeth during sleep (known as bruxism) can lead to issues with blood flow and inflammation in the inner ear, resulting in a decreased hearing ability.
During the process of teething first and chewing later, we also involuntarily stress the auditory system. Sensory cells, located inside the cochlea, always need good vascularity to pick up the sound wave and transfer it to the brain. That is why even the extraction of wisdom teeth can sometimes lead to ear pain and ringing in the ears (tinnitus).