Don’t know about when they are caused by chemo, but I get a lot of small mouth ulcers from one of my illnesses and I find dabbing a little toothpaste on them several times a day works wonders. But I might be an oddity in that so probably best to wait for someone else’s reply.

Hi, I use Diflam  spray, I find it eases the pain especially before trying to eat. I would also say to nurses and they would probably give you somthing.