Burns are injuries to the skin and underlying tissues caused by heat, chemicals, electricity, or radiation. They are classified into three main types: first-degree burns affect only the outer layer of skin, causing redness and pain; second-degree burns involve deeper layers, leading to blisters and swelling; and third-degree burns damage all layers of skin, resulting in a white or charred appearance. Treatment for burns depends on their severity. First-degree burns can often be treated at home with cool water and over-the-counter pain relief. More severe burns, such as those classified as second-degree or third-degree, may require medical attention, including dressings, medications, or even surgery.