Final answer:
Burns are categorized as first-degree, second-degree, and third-degree. First-degree burns affect only the outer skin layer and generally heal on their own, while second-degree burns cause blisters and require cleaning and bandaging. Third-degree burns penetrate deeper and necessitate immediate medical treatment.
Step-by-step explanation:
Burns are classified into three main types: first-degree, second-degree, and third-degree burns. First-degree burns affect only the epidermis, the outer layer of skin, and typical first aid includes cooling the burn under tepid water and covering it with a sterile, non-adhesive bandage. Second-degree burns affect both the epidermis and part of the dermis, leading to swelling and blisters; first aid involves cleaning the area gently, applying antibiotic cream, and covering with a loose gauze bandage. Third-degree burns, the most severe, extend through the dermis and affect deeper tissues. They require immediate medical attention, and first aid focuses on preventing further injury and infection by covering the burn with a cool, moist sterile bandage or clean cloth until professional help is available.