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.
Fever blisters are small, red sores that typically appear on the lips, outside the mouth or in the nostrils. They develop a scab after a few days and are painful and irritating. Also called cold sores, fever blisters are caused by the herpes simplex virus.The virus remains in the body, where it can reactivate. A recurrence of fever blisters can be triggered by several factors.ever blisters are caused by the contagious herpes simplex virus type 1--the most common herpes virus. This virus can be passed from person to person through direct contact with saliva and skin infections.