Wisdom teeth are four permanent adult teeth that are located on the top and the bottom of the mouth. Although permanent teeth are meant to last a lifetime, there are a number of reasons a tooth extraction may be needed. A wisdom tooth can cause immense pain on certain occasions and would need to be extracted. Pain occurs as wisdom teeth grow at a weird angle, so much so that there is no room for any further growth. It can also get badly damaged from trauma or decay to be repaired.