Final answer:
A first degree burn is characterized by redness and affects only the epidermis, typically healing on its own within a few days without leading to blistering or charring.
Step-by-step explanation:
The primary characteristic of a first degree burn is redness. This level of burn is considered superficial, affecting only the outermost layer of the skin, known as the epidermis. Due to this superficial nature, the skin may become painful and swollen; however, these burns typically heal on their own within a few days. A common example of a first-degree burn is a mild sunburn. Unlike more severe burns, first-degree burns do not lead to blistering or charring of the skin and do not produce pustules. It is worth noting that the cardinal signs of inflammation such as redness, swelling, pain, and local heat can be present with these burns.
A first-degree burn is characterized by redness and affects only the epidermis of the skin. It may cause pain and swelling, but typically heals on its own within a few days. Examples of first-degree burns include mild sunburns.