What is a common characteristic of a first degree burn?

A first-degree burn is characterized by its effects on the epidermis, which is the outer layer of skin. The common characteristic includes skin that appears reddened but remains unbroken. This type of burn usually results from brief exposure to heat, such as a mild sunburn, and is generally considered the least severe.

The absence of blisters and damage to deeper layers of skin distinguishes first-degree burns from more severe burns, such as second-degree burns, which do form blisters, and third-degree burns, which can destroy the skin layers and require surgical intervention. Thus, the redness and presence of intact skin are key indicators of a first-degree burn.