Don't worry, the dentist won't perform any extraction during swelling. It seems that you are having an infection. So, i would suggest you to inform your dentist and get the case clinically checked and don't go for extraction under such condition. You can take anti-inflammatory drugs but only under the supervision of a dentist. To know more about wisdom tooth extraction visit the link...http://www.identalhub.com/articlecategory-wisdom-teeth-47.aspx