You may have tinnitus, a condition that causes you to hear sounds such as ringing, buzzing, or humming in your ear. This can come about after a tooth is pulled because of the closeness of the jaw joint to the ear. The shift in your jaw may be the reason behind your ear's irregularity. Steer away from loud noises, manage stress, and get enough sleep. But if it continues, go to the doctor for a further check-up.