Commute 45 to 59 min. 7.20%. Commute greater than 60 min.
1 Oral Ulcers: Usually, an ulcer is referred to as an open wound which is formed inside the mouth and this occurs due to the invasion of micro organisms. 2  Sometimes, blood blisters are caused due to the skin infections caused as a side effect of medications. 3  Ulcers are of two types they are: Canker sores and Cold sores.
There are various causes of blood blisters inside of cheeks and other parts of the mouth as follows: 1  Herpes simplex virus that causes cold sore can cause blood blisters in the mouth. The blisters may erupt after a few days of infection. 2  Some people are allergic to some allergens that are found in food.