A bone fracture occurs when physical force exceeds the strength of the bone. There are different types of fractures including closed/simple fractures where the bone breaks but skin is intact; compound fractures where the broken bone pierces the skin, increasing risk of infection; and comminuted fractures where the bone is shattered into multiple pieces. An open fracture is when skin integrity over the break is disrupted, allowing potential infection into the bone. These require aggressive cleaning and often surgery to address effectively.