When this fluid collects underneath the superficial layers of the epidermis (the outer layer of skin), a burn blister is ...

damage the nerves under the skin and might not hurt at all. A first-degree burn, or a superficial burn, is relatively minor. It damages only part of the first layer of skin, known as the epidermis.

Superficial burns, known as first-degree burns, affect only the epidermis, which is the outer layer of skin. The burn site will often be red, but blisters do not develop. Second-degree burns ...