I have a cut in my mouth and it's white and craters in. also, it's purple and pink around it and a little swollen. what is it/what do i do?

More info needed...: How large is it? How long has it been there? Is it located next to a tooth or on the other mucosa? Medical history? Smoking? Chewing tobacco? Your age? As you can see, more info is needed to diagnose your problem. Please see a local dentist to be examined.

Sorry: To many variables. Has to be examined by a Dentist to do differential diagnosis and then devise treatment plan. As lesion is both white and I Duarte do it should be examined by Dentist or Oral Surgeon immediately.