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.
Chronic Lyme, Bart., Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut dysmotility & non-specific inflammation, Lupus, Osteoporosis, etc.; G-Tube
Meds: Flagyl, Domperidone, Zofran, Claritin, Andrographis & other herbs, homeopathy, supplements, etc.