Wisdom tooth is the most backside tooth in mouth which erupts at age of 20-25 years. It does not used in any function like chewing. Most of the time it partly visible and covered with gums/skin.
An incorrectly positioned wisdom tooth can damage adjacent teeth/gums and may results in sensitivity, pain, difficulty in opening mouth. In such situations, it should be removed as soon as possible.
Wisdom tooth removal should be done by specialist surgeons only because untrained doctor may damage nerves, bones or adjacent teeth.