The swelling and pain after drinking warm water twelve hours after tooth extraction may be a normal reaction, or it may be due to postoperative infection and inflammation. Depending on the cause, temporary observation, general treatment or medication can be taken to relieve the symptoms. 1. Normal reaction: after the extraction of teeth in a short period of time may appear to drink water distension, is a normal reaction, generally do not need special treatment, temporary observation can be, but try to choose to drink warm water. 2. Post-operative infection: If the tooth is infected with inflammation within a short period of time after extraction, causing inflammatory exudation, which may cause pain and swelling when drinking water, you should follow the doctor’s instructions to take cefixime, ampicillin, azithromycin for anti-inflammatory. 12 hours after the extraction of teeth, such as drinking water tooth distension and pain, it is recommended to observe for a period of time, if the long term does not go away, it is necessary to consult a doctor in a timely manner.