First aid is the provision of initial care for an illness or injury. It is usually performed by non-expert, but trained personnel to a sick or injured person until definitive medical treatment can be accessed. Certain self-limiting illnesses or minor injuries may not require further medical care past the first aid intervention. It generally consists of a series of simple and in some cases, potentially life-saving techniques that an individual can be trained to perform with minimal equipment.It is basic knowledge about injuries (body damage). It is used at accidents to help stop more serious harm from happening to an injured person until he receives medical treatment. A person does not need a lot of equipment to give first aid. Because of this, it can be done just about anywhere.