Hi.
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that you have a
canker sore over the labial sulcus [mucosal fold that connects the lip to gums] or it can be a traumatic ulcer caused due to
injury with some hard food that would have injured that area..
You need not to worry and do warm saline gargles..
Apply a numbing gel like Oragel over the sore for relief..
Apply a
Steroid based ointment like Kenalog in Orabase for reducing inflammation and pain..
Sucking ice pops can also help..
In case of pain OTC painkiller like Ibuprofen[
Advil or Motrin] can be taken..
Avoid spicy and hard foods to prevent further irritation..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora..