What is the main feature of a second-degree burn?

A second-degree burn is characterized by the presence of blisters and significant pain, which directly affect deeper layers of the skin beyond just the outer layer. This type of burn extends into the dermis, resulting in damage that causes the skin to blister, swell, and exhibit severe pain. The formation of blisters indicates that the burn has penetrated deeper than a first-degree burn, which only affects the epidermis and results in redness and swelling without blistering.

In a second-degree burn, the pain can be quite intense due to nerve endings being affected, and the blisters themselves can serve as a protective barrier for the underlying skin as it heals. This is an important aspect of second-degree burns that helps differentiate them from less severe burns. By assessing the presence of blisters and the degree of pain, a first aider can better understand the severity of the burn and provide appropriate care.