An impacted tooth is one that fails to erupt or emerges only partly into the dental arch within the expected time. Most commonly wisdom teeth are impacted. An impacted tooth remains stuck in gum tissue or bone because of inadequate arch length or the jaw may be too small and leaves no room for the teeth to emerge. A wisdom tooth can emerge in an angle towards the other teeth or can be tilted in your jaw.
Initially they are often painless and does not cause problems. However, in the course of time when an impacted wisdom tooth tries to come in, the flap of gum on top of it can become infected and swollen and leads to pain. It also gives unpleasant mouth odor and worst is an infection called pericoronitis. If left untreated, this infection can spread to the throat or into the neck.
It is highly recommended to visit your dentist if you sense that your teeth is impacted and you feel pain . And good oral hygiene is a must to prevent cavities.