What causes mouth ulcers?

Question

apart from things like braces and dentures.

Sometimes they seem to pop up for no reason

Answer 1

No one knows the cause. I assume you are referring to canker sores. They are suspected to be a reaction of the immune system and are not contagious.  

Answer 2

Don't know how to explain this too well, but foods are split into "hot" and "cool" categories. Eating too many "hot" foods is a reason for ulcers (and this does not refer to the temperature of the food you eat, so don't go freezing everything to avoid ulcers; it won't work). For example, mandarins are "hot" foods, and bananas are "cool" foods. You might want to look up a list.

I also get a ton of ulcers when I eat products with lots of MSG in them.

Answer 3

It could be genetic.

I get them all the time for no reason and so does my dad and a few of his sisters.

Some people think they're caused by acidic foods but I'm not too sure about that.

All I know is that they're being passed down through my family!

=]

Answer 4

Some times jst irritation of the food you eat  

Answer 5

Hmmm... I do sometimes get ulcers for no reason... but my ulcers usually appear after I've bitten my lip or cheek. I have a few small ones on my bottom lip right now, and they're killing me. I have braces and the biggest ulcer is touching one. It kills! Btw, I never knew about that hot and cold thing. Maybe it's because of the level of citrus acid in madarins. Hmm... I think a few banana's are in order...