I have little white bumps all over my lips and gums. I just went to the dermatologist last week...said it was not cancer. Your mouth is FULL of little papillary glands that swell and look like white heads. Mine come from dry mouth...or so my dentist told me. Some dentists now have this liquid you swish around in your mouth to detect oral cancer. If your dentist said not to worry, I would calm down. Just say NO to Google.