Pericoronitis is one of the most common indications for emergency extraction of a wisdom tooth and Typically happens when there isn’t enough space for eruption of all the teeth in the jaw. Infection symptoms are red, swollen gum tissue behind the last visible molar, bad taste/smell, pain with biting in the back teeth, and sometimes pus oozing and draining from the area. Occasionally, the infection will lead to swelling of the gum tissue, cheek, or another area around the affected side of the jaw. Swelling can cause pressure on adjacent structures and can radiate to the ear causing an intense earache. Sometimes an ear infection or a sinus infection can cause pain that radiates to the teeth as well, so it is very important to get examined whenever there is suspicion of infection.