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.
Another fairly common cause for facial blisters is the herpes zoster or varicella zoster virus, the same virus that causes chickenpox. This virus also affects the nerves leading to the skin and can recur in adults as shingles.. This is a very painful, blistering rash that may include the face, eyes, mouth and ears.