5dys after 4wisdom teeth extracted. have bad canker sore by extraction site. and 2 not so bad ones. what can i do about to get rid of them?

Canker sores: Canker sores, also known as mouth ulcers or mouth blisters, usually heal on its own in about a week or two. If the sores continue to persist, or are large or painful, visit your dentist. Depending on the nature and severity of the sore, dentists prescribe antimicrobial mouth rinses, corticosteroid ointments, or a prescription to reduce the pain and irritation.