Tooth extraction is followed by a post operative healing phase which can come with some discomfort which is variable amongst patients. If additive factors like hormonal changes also occur during this phase, tissue integrity is definitely compromised and healing can also get delayed. Don't worry both of these are temporary phases and will end soon. Just follow the post operative instructions given by a dentist meticulously and use in a anaesthetic ointments containing benzocaine or lignocaine on the sores for temporary symptomatic relief. Regards.

Greetings. Go for a check up to your dentist. Your symptoms could be due to trauma( cheek bite ) or due to antibiotics. For temporary relief you can gargle/ rinse with warm saline. Apply dologel on blisters. De stress yourself as stress in itself can be cause of ulcers.