This sounds like that one Ray bradburry story called All summer in a day

The reason you get canker sores is stress, eating sour/spicy things, biting your cheek/tongue and having braces.

Would this work for canker sores ON my tonsils and in the back of my throat? It already feels dry but I don't know if that's the burn of the sores or if it's actually dry and I shouldn't make it drier.