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.
A number of medical conditions may cause blisters. The most common are: 1  chickenpox â a childhood illness that causes itchy red spots. 2  cold sores â small blisters that develop on the lips or around the mouth, caused by a virus. 3  herpes â a sexually transmitted infection (STI) that most commonly affects the groin.