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.
A. Shingles, or herpes zoster, is caused by the chicken pox virus. Once you have had chicken pox, the virus remains dormant in your body. When this virus reawakens, it causes a blistering rash called shingles. If shingles affects the trigeminal nerve on the face, it can cause sores to appear on one side of the mouth, tongue and palate. Other viruses, including herpes can also cause blisters around the mouth.