Thanks for your query.
You seem to have developed a mucous or a retention cyst
in your oral mucosa
Now such lesions usually occur after any kind of trauma to the oral mucosa which can be in the form of a teeth bite.
These cysts have to be either treated with cryosurgery
of chemical cautery or it has to be removed surgically.
I would advise you to see a dermatologist
for the same as no topical medications will help in this condition.
Hope it helps.
Dr Geetika Paul