Scarring bullosa or epidermolysis bullosa is a rare skin condition that causes skin sensitivity and is prone to blisters. A warm hug, gentle rub on the back, or changing a diaper may trigger skin blisters that may result in minor injury.
Blisters can form inside the body in rare cases, most commonly on the lips, throat, stomach, rectum, intestines, and other parts of the body. The friction created by ingesting food or having a bowel movement can cause painful blisters in these locations.
Although some varieties of EB are less likely to produce chronic disability, any type of scarring bullosa can induce severe symptoms.