What is a key feature of second-degree burns?

Second-degree burns are characterized by damage that extends beyond the outer layer of skin, known as the epidermis, into the underlying layer called the dermis. One of the key features of second-degree burns is the presence of redness and blisters. This occurs because the injury affects both the epidermis and part of the dermis, leading to inflammation, swelling, and the formation of fluid-filled blisters as the body's response to the injury.

In contrast, superficial burns (first-degree) do not cause blisters and only affect the outer skin layer. Burns that destroy only the epidermis are also classified as first-degree. Additionally, second-degree burns do not extend down to muscle tissue; that level of damage indicates a third-degree burn, which is more severe and requires different medical evaluation and treatment. The correct identification of these features is crucial for proper first aid and treatment, as it helps determine the best course of action for care and healing.