First aid is immediate medical help given to someone who is injured or suddenly becomes ill, before professional medical care arrives. When someone cuts their finger badly, gets a nosebleed, sprains an ankle, or faints, the quick actions taken in those first moments are first aid.

First aid can be simple, like cleaning a scrape and putting on a bandage, or more serious, like helping someone who has stopped breathing. The goal is to prevent the injury from getting worse, reduce pain, and keep the person as safe and comfortable as possible until a doctor or paramedic can take over.

People learn first aid by taking classes that teach skills like how to stop bleeding, treat burns, recognize signs of serious problems like concussions, and perform CPR (a technique to help restart someone's heart). Schools, workplaces, and public places often keep first aid kits stocked with bandages, antiseptic wipes, gauze, and other supplies for treating common injuries.

Knowing first aid means you can help a friend, family member, or even a stranger when seconds matter and professional help is still minutes away, while still getting an adult or emergency services involved as soon as possible.