Blood blisters due to food allergy?

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New Member

Date Joined May 2007
Total Posts : 1
   Posted 5/4/2007 4:47 AM (GMT -6)   
I am getting a blood blister on my tongue 2 or 3 times a month. Every time that it has happened, I have been eating bread - usually, but not always, French-style white bread. I know that blood blisters can be caused by trauma, but I am not aware of the bread pieces being particularly sharp - and the blisters always occur along the edge of my tongue, and never elsewhere within my mouth.

I am getting the distinct impression that the cause must be an allergy to something within the bread - possibly to an added "bread improver" rather than to gluten (since the problem seems to occur with only certain types of bread).

Are there any allergies (particularly any allergies that might be related to bread ingredients) that would be associated with blood blisters on the tongue?

New Member

Date Joined May 2013
Total Posts : 2
   Posted 5/15/2013 3:10 AM (GMT -6)   
I've been getting blood blisters in my mouth (and other places) as a result of food (or things in food) that I've eaten. This has been happening since probably about 2006. I'm 33.

I first noticed that I got the blood blisters in my mouth when I ate things with BHT (and/or BHA) in them (like cereal and gum).

I then noticed I got them when I ate burnt food (like burnt pancakes or toast). I got the blood blisters on my cheeks (inside my mouth), primarily. I got them on my tongue a couple times, but they were very small, then, although they were only painful when on my tongue, interestingly.

However, I began to notice that I would get these blood blisters on my legs, too. Oats and papaya enzymes also brought these on.

I haven't been having them much in a long time, however (but I don't eat the things that bring them on much, except oat-free cereal). I prefer corn-based cereals most, now. Frosted shredded wheat definitely brought them on (the bagged Malt o meal kind—I don't think I ever got it from raisin bran). I did get one recently on my right big toe, however. That was weird. I actually took a picture of it.

Might I reiterate that these were all painless blood blisters (except the small ones on my tongue). They weren't the sort that when you pop it really hurts and feels like the skin is burning.

I also note that I have felt them appear. They don't take time to form. They pop up instantly (without friction), as soon as whatever food it is touches that part of my mouth. It's quite interesting.

Someone once said they heard that salt had something to do with it. I did shower with salt water, and I do brush my teeth with salt water. Maybe that has something to do with it. I don't shower with salt water anymore, though (but I had these issues before I did any of that).

It's not as obvious that the blood blisters on my legs are blood blisters. They sometimes just look like red spots, like a mix between a zit and a bruise. Actually, I guess those ones hurt a little bit, or feel a little tender, but it's pretty obvious they weren't caused by friction. The one on my toe was more like the ones on my cheeks. I'd get them on the undersides of my tongue, too (those didn't really hurt, but the ones on my tastebuds were the ones that hurt).

I seem to have issues when I eat certain things. So, I was thinking maybe it's because of some kind of weird food intolerance.

I haven't met anyone else with this problem, and I didn't know anyone else had it until today. It worried me because I never knew where or when these things would appear. They seemed to be appearing in new places. Sometimes they were kind of big, and sometimes they were puny.

New Member

Date Joined May 2013
Total Posts : 2
   Posted 5/15/2013 3:13 AM (GMT -6)   
I should note that as far as I recall I've only ever had one blood blister of this variety at a time. The one on my toe might have actually been a real blood blister from friction, but the others I'm talking about definitely were not.

Veteran Member

Date Joined Aug 2007
Total Posts : 4415
   Posted 5/16/2013 1:37 AM (GMT -6)   
I get blood blisters in my mouth if I eat certain things. There was a chewable digestive enzyme I was using with very good results, but after several years of use, it started giving me a blood blister in my mouth every time I ate one.

I've also gotten blood blisters in my mouth from sulfites in dental anesthetics. So it is possible the digestive enzyme that was giving me the blood blisters had sulfites, I just didn't know about sulfites or my having a sensitivity to sulfites at that time.

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New Member

Date Joined Jul 2015
Total Posts : 1
   Posted 7/27/2015 4:43 PM (GMT -6)   
I have just found this thread which. The cause is almost certainly an allergy.

I have suffered from mouth blisters when eating bread for many years now but have managed to trace the cause. There is an additive known as Calcium Propionate, to which I seem to be allergic, which is used as a mould preventer. It is usually found in bread baked by larger conglomerates and gives the product a longer shelf life. It can also be found in cheaper flour. It can be a nightmare trying to work out which products contain it, especially when bread is sold unwrapped in some supermarkets. The only way I have found of being safe is to eat bread from stores that I know don't use it - or just eat organically. Even so I have been caught out having blistered after eating quiche, biscuits, muffins - or any wheat containing product. Occasionally, folks can get a little defensive when I ask about their baking if it involves wheat containing foods when visiting friends or at a social. The safest way can sometimes be to claim gluten intolerance as folks seem to understand that!

The symptoms are almost immediate with a large blood blister erupting, usually on the side of the tongue which can be very sore and painful for several days, making eating very painful and even affecting speech until it heals.
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