Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns...
As per your complain and presentation of symptoms apthous ulcers or canker sores commonly occurs due to
nutritional deficiency of iron,
vitamin B12 and Folic acid, gluten insensitivity is also a cause but has many other symptoms too,
parasitic infection in mouth is vry rare and does not cause canker sores..
Nothing to worry you can take a
multivitamin tablet daily for atleast 2 months..
Take anti-inflammatory painkiller like Ibuprofen.
Apply a numbing gel containing Lignocaine over the ulcers.
Gargle with 1:1 solution of benadryl and
milk of magnesia..
Warm saline gargles will also help..
Avoid hot and spicy food and take a soft cold diet..
Suck on ice pops for relief..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.