What Causes Blood Blisters In Mouth After Eating Particular Food?

consult with you about my blood blister happening occasionally, for the first time I got one in my mouth like 5 years ago after eating a very sour food, then it happened to me 1 year after for the same food.. 2 months ago I found them again in my mouth on my cheek inside my mouth, then I found them after 1 months again 2 days ago and today,it is not very severe and large it is like 1 or 2 mm.. and for all of these times I squeezed them right away. it is always only one.. but it happened to accure 2 days later again only one but another side.. I feel when I eat some foods it comes like this.. I am concerned about it, is it dangareous doctor? regards, Ali