First aid involves providing immediate care to an injured or ill person until full medical treatment can be obtained. It aims to preserve life, prevent further harm, and promote recovery. Key skills for first aiders include being observant, resourceful, gentle, tactful, sympathetic, and cheerful. Common first aid treatments include caring for bone fractures, burns, choking, wounds, and more. A well-stocked first aid kit should contain essential supplies like a first aid manual, tweezers, alcohol swabs, antibiotic ointment, bandages, gauze pads, tape, elastic bandages, pain relievers, and cold packs.