Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that you had a severe
allergic reaction to
Methotrexate leading to Apthous Ulcers or Canker Sores..
I would suggest you to consult an Oral Physician and get evaluated and a thorough clinical evaluation and investigations as per suspected cause can help in diagnosis and treatment can be done accordingly..
As of now you can start gargling with numbing mouthwash containing Lignocaine to relieve pain and discomfort..
You can start taking
Multivitamin supplements daily for atleast one month..
You can start doing warm saline gargles..
Take Ibuprofen to relieve pain..
Suck ice and rinse cool water..
Avoid hot and spicy food and take a soft bland diet..
You should maintain avoid
Oral hygiene..
Drink plenty of water..
Avoid Stress by doing
meditation and yoga..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.