Can you use warm compresses on an abscess tooth with facial swelling?

Yes: A warm compress can help with the swelling and discomfort. You need to get the infection checked by your dentist asap as it can spread rapidly.

Yes, but...: Although warm compresses may relieve your pain and swelling, the cause of the problem must be dealt with. See a dentist as soon as possible for a proper evaluation, diagnosis, and definitive treatment.

Never: When you have an abscess, using warm compress is the last thing you want to do. The opposite. You need to use cold compress. An abscess is an accumulation of pus, which can travel through fascia, the layer between muscle and bone, and develop into am infection needing hospitalization. Cold compress will "solidify" the pus making less likely to travel, while warm compress will make it more liquidy.