I've had mouth issues throughout treatment.  Mainly my tongue just gets inflamed and looks and feels like I drank something  hot and burned it!  And yes, at times I've had canker sore/blisters on the inside of my cheeks. Always went away within a couple days so I never really worried about it.  I think Matia told me once that it was from all the inflamation in my body.

I have had mouth sores and cold sores and then I really freaked out when my gums started getting swollen and red  and sore and easily bled. That did  not happen all on the same day but its a great sign - what you said. Very common die off symptom. It should go away soon. Mary

i also get canker sores...i had two in two weeks and they were really bad..i also too get sores in my mouth...and i kno they are irritatin...never asked her either cause they go away quicker than a canker sore...with the canker sore she told me to use golden seal or oil or oregnal...but the oil really burned..so i just used regular oilive oil and the golden seal...