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 several causes for developing a blood blister in your mouth cheek; however, only a few of them are treatable. They happen when there are excessive microorganisms within the oral cavity. And side effects of some anti-infection medications also can lead to oral ulcers.