Extractions become a necessity for a variety of reasons; severe infection in the tooth or root of the tooth that renders it unsavable. Vertical fractures that extend to the tooth roots. Trauma to the tooth that cause it to "die". Severe periondontal disease that causes the tooth to loosen from the jaw bone.
Whatever the reason extractions can be an answer to uncomfortable dental problems. Your dentist will advise you of an extraction is the best course of action.