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.
Blood Blister on Lip. Blister on lip is also known as cold sores. It is a viral infection that causes small blisters that are filled with fluid to occur on the lips, around the mouth and on the edge of nostrils. It causes pain, itching and burning sensation before bursting to form crusting.