Depending upon the extraction, it is normal to have swelling for at least a week post extraction. Do mouth rinsing with warm saline gargles. This will help to kill any germs plus it also helps to make the gums shrink a little.
Wait for a week and if the swelling is also there after a week that i would suggest you to visit a dentist. for more info you can visit the link...http://www.identalhub.com/dental-knowing-all-about-wisdom-teeth-719.aspx