This document provides information on first aid, including its nature and objectives, importance, principles, and treatments for common injuries. First aid is defined as the immediate care given to injured or ill persons to sustain life, reduce pain, and prevent further injury. The objectives are to prolong life, lessen pain, and prevent further injury. It is important to help yourself, help others, and prepare for disasters. Key first aid principles include ensuring safety, assessing the situation, taking immediate action, and calling for help. Common injuries and their treatments covered are wounds, nosebleeds, animal bites, burns, and sprains.