First-degree burns are the mildest type of burn, affecting only the outer layer of skin, known as the epidermis. These burns usually occur from sources like sunlight, hot liquids, or brief contact with flames. Symptoms include redness, minor swelling, and pain, but they typically heal within a week without scarring. To treat a first-degree burn, it’s important to cool the area with running water or a cool compress. Over-the-counter pain relievers, like ibuprofen or acetaminophen, can help manage discomfort. Keeping the burn clean and moisturized with lotion can also promote healing and prevent infection.