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.

Accurate estimation of the TBSA of a burn is essential to guide management. Multiple methods have been developed to estimate the TBSA of burns. These methods are not used for superficial burns.