Wisdom teeth are also known as third molars. They usually start coming in between the ages of 17 to 21. They may become impacted if there is not enough space in your mouth for them to erupt fully. A wisdom tooth becomes impacted when it is blocked from pushing through the gums into your mouth. Wisdom teeth can also sometimes come in sideways or be tilted.
However, the gums covering part of or the entire impacted tooth can become infected causing swelling and pain. This is called pericoronitis. Sometimes you might even feel pain in your ear from an impacted wisdom tooth. The infection can spread down your throat or into your neck requiring you to be admitted to the hospital. An impacted tooth can sometimes get a cavity or cause a cavity on the tooth in front of it.
Some of the symptoms of pericoronitis include: