Commute 45 to 59 min. 7.20%. Commute greater than 60 min.
6. This condition causes blood blisters to form on the inner cheek, gums, tongue and/or the roof of the mouth. It is caused by the herpes simplex virus 1 and symptoms, like pain, a burning sensation, fatigue and fever, will be felt.
1 Sometimes, blood blisters are caused due to the skin infections caused as a side effect of medications. 2  Ulcers are of two types they are: Canker sores and Cold sores. 3  Canker sores cause blood blisters inside the mouth.