Hi, I've been having pain in the left side of my mouth for awhile, in the beginning I didn't know what to think, then I slowly thought it was wisdom teeth. I believe that what it is. I started to take tylenol with codeine that was prescribed to me awhile back. After a few days I notice the inside upper lip is swelling. It's only in the middle of my lip. My tooth pain has stop, but swelling is a problem. I can't go to the denist because of Holliday weekend.