What is NOT a symptom of a first degree burn?

A first-degree burn affects only the outer layer of the skin, also known as the epidermis. The symptoms typically associated with this type of burn are pain, redness, and mild swelling. These symptoms result from the inflammation and damage to the skin's superficial layers.

Blistering, on the other hand, is a characteristic of second-degree burns, which affect both the epidermis and part of the underlying layer of skin (the dermis). In second-degree burns, the damage is more extensive, leading to fluid accumulation beneath the skin that causes blisters to form. Therefore, blistering is not a symptom of a first-degree burn, making this the correct answer in differentiating between the types of burns. Understanding the distinctions between the burn degrees is crucial for accurate assessment and treatment.