Your dentist may recommend extracting a tooth if:
Wisdom teeth (which typically come in during your teens or twenties), might need to be extracted if they are decayed, infected, or causing pain. They may get impacted (stuck underneath another tooth) which also requires extractions.
Most visible teeth can be removed with a simple extraction, where your dentist loosens the tooth. Then removes it carefully with forceps. This procedure typically requires just a local anesthetic (an injection).
A surgical extraction may be needed if:
During a surgical extraction, a local anesthetic may be provided if needed.