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.
They are NOT CONTAGIOUS and are caused by bacteria. Fever blisters are painful fluid filled blisters or cold sores that usually occur OUTSIDE the mouth-on the lips, chin, cheeks or in and on the nostrils. If they do occur inside the mouth, it is usually on the gums or the roof of the mouth.