>>470601get them some Zantac / Ranitidine Hydrochloride (reduces acid production in the stomach), and don't give them sandwiches. then take them to a doctor to get the ulcers diagnosed - they'll probably want a gastroscopy to confirm it - and then get them the course of antibiotics that get rid of Helicobacter Pylori, the little bastards that CAUSE ulcers.
pic bloody related, because i am infested with these little sods.