Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain mouth ulcers or canker sores can occur due to a number of causes like
Vitamin B12 and
iron deficiency,
acid reflux, dry mouth, stress, side effects of medicines, digestive issues etc..
In your case digestive problem can be a cause as the medicines that you are taking are generally not seen to cause side effects..
I would suggest you to start taking
multivitamin supplements containing vitamin B complex, iron,
folic acid etc..
You should do warm saline gargles.
You can also gargle with soda bicarb solution..
If there is pain you can apply numbing gel containing Lignocaine and Choline Salicylate over it..
You can do cool water rinses and suck ice..
Avoid spicy and chilled foods..
In case of no improvement consult an Oral Physician and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.