The Student Room Group

Reply 1

I wouldn't haev thought so but it could be. I thought you got mouth ulcers if you were run down but they probably just crop up for no reason. A really good way to get rid of them is to add a few teaspoons of salt to freshly boiled water and some cold water so its warm not hot and then swill round your mouth and then spit out. They'll go within days.

Reply 2

Probably. Both my mum and sister claim sour fruit gives them ulcers. They've started to cut them into pieces now rather than biting into them.

Reply 3

Lots of sugar is supposed to give you mouth ulcers, so the natural sugars in the fruit may be doing it.