Final answer:
Burns are injuries to the skin that are caused by exposure to extreme heat, radiation, or chemicals. They are divided into four categories based on their severity, ranging from first-degree to fourth-degree burns. Burns have a high risk of infection due to the dead tissue caused by the burn.
Step-by-step explanation:
Burns are injuries to the skin that occur as a result of exposure to extreme heat, radiation, or chemicals. They are divided into four categories based on their severity. First-degree burns affect the outer layer of the skin and heal on their own within a few days. Second-degree burns go deeper and result in blistering of the skin. Third-degree burns fully penetrate the skin and require medical attention. Fourth-degree burns are the most severe, affecting the underlying muscle and bone.
Burns are also at a high risk of infection because the dead tissue from the burn provides a favorable environment for bacteria and other pathogens. It is important to keep burn sites clean and sterile to prevent infection. Infection can lead to further complications and delay the healing process.