Source; Simple first aid tips everyone should know

 Definition: 

It is the immediate care or treatment administered to an ill or injured person before professional medical aid can be obtained. 

AIMS OF FIRST AID: 

1) Preserve life - This includes the life of the casualty, bystander and rescuer. 

2) Protect the casualty from further harm - Ensure the scene is safe. 

3) Provide pain relief - This could include the use of ice packs or simply applying a sling to a fracture or a broken collar bone. 

4) Prevent the injury or illness from becoming worse - Ensure that the treatment you provide does not make the condition worse. 

5) Provide reassurance