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.
The allergic reaction can show up as a mouth blister. 7. Mouth Injury. If you eat foods that are hard or foods that are too hot, you can cause damage to the lining of the cheeks and this can result in blood blisters. If you eat your food too fast, you can accidentally bite the inside of your cheek or your tongue.