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.
One of the more common ways a blood blister can form has already been mentioned. The blister is formed by pinching. In this case, the pinching occurs between the surfaces of your upper and lower teeth. If a blister forms, it will usually do so on the inside of your cheek, and most often occurs while eating.