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.
An oral ulcer is the most common cause of a blood blister in mouth. Oral herpes, unknowingly biting the cheek, nutritional deficiency and food allergies too can bring about mouth blisters.Advertisement. Tearing of the blood vessels that lie below the outermost layer of the skin results in formation of blood blisters.n oral ulcer is the most common cause of a blood blister in mouth. Oral herpes, unknowingly biting the cheek, nutritional deficiency and food allergies too can bring about mouth blisters. Advertisement. Tearing of the blood vessels that lie below the outermost layer of the skin results in formation of blood blisters.