First aid involves providing immediate care to someone who is injured or ill. The goals are to prolong life, alleviate suffering, and prevent further injury until medical help arrives. A first aid kit contains supplies like bandages, gauze, antiseptics, and splints. Common conditions requiring first aid include fainting, nosebleeds, wounds, fractures, and sprains/strains. Proper bandaging techniques help immobilize injuries, apply pressure to bleeding, and support injured body parts. Different types of bandages like triangular bandages and cravats can be applied in various ways depending on the location of the injury.