Hi..
Thanks for the query.
From your explanation it seems that you are suffering from a severe case of Apthous ULcers or Canker Sores .
It can occur due to a number of common causes like of iron and
vitamin B12, stress, physical trauma to the tongue, allergies,
acid reflux etc..
If the pain is severe you cantake anti inflammatory painkiller like
Ibuprofen.
I would also suggest you to start gargling with warm saline solution.
Gargle with a numbing mouthwash containing Lignocaine, specialised mouthwash like Magic Mouthwash is very useful if available in your area...
Take a Vitamin B complex and
lysine supplenet daily for atleast 15 days..
Avoid spicy and hard foods..
Take a soft and bland diet..
You can also suck ice and do cool water rinses..
In case of no improvement consult an Oral Physician and get evaluated..
Hope this helps..
Regards.
Dr.Honey Arora.
Dentist.