A burn that affects only the outer layer of skin is classified as a first-degree burn. This type of burn results in redness, minor swelling, and pain, but does not cause blistering or damage to deeper tissues. Commonly associated with sunburns or brief contact with hot surfaces, first-degree burns usually heal within a few days without medical intervention. Proper care, such as cool compresses and aloe vera, can alleviate symptoms and promote healing, although severe cases might still require professional assessment to avoid complications.