First Aid Basics Everyone Should Know (Could Save a Life)

A few years ago, I watched a man choke on food at a restaurant. Everyone froze — including me. By sheer luck, an off-duty nurse was two tables away and performed the Heimlich maneuver in seconds. The man coughed up the food and was fine.

But I was shaken. What if that nurse had not been there? I realized I had no idea how to help in a medical emergency, and that terrified me. So I took a first aid course, read everything I could find, and made it my mission to know the basics.

This guide covers the essential first aid knowledge that everyone should have. It is not a substitute for professional training — I strongly encourage taking a certified course — but it will give you the foundation to act when it matters.

Important disclaimer: This article is for educational purposes only and does not replace professional medical training or advice. In any serious emergency, always call emergency services (911 in the US) first.

The Golden Rule: Call for Help First

Before doing anything else in a serious emergency, call 911 (or your local emergency number). This is the single most important step. Professional help needs to be on the way while you provide first aid.

If you are alone, put your phone on speaker. If others are present, point to a specific person and say, “You — call 911 now.” Being specific prevents the bystander effect, where everyone assumes someone else will make the call.

While on the phone, the dispatcher will guide you through what to do. They are trained for this. Follow their instructions.

CPR: The Skill That Saves the Most Lives

Cardiac arrest kills about 350,000 Americans outside of hospitals each year. Immediate CPR can double or triple a person’s chance of survival. Yet only about 40% of cardiac arrest victims receive bystander CPR.

How to Recognize Cardiac Arrest

The person is:

• Unresponsive (not reacting when you tap their shoulders and shout)
• Not breathing normally (no breathing, or only gasping)

Do not waste time checking for a pulse — even medical professionals find this unreliable in an emergency.

Hands-Only CPR (For Untrained or Unsure Bystanders)

If you are not CPR-certified or are uncomfortable giving rescue breaths, hands-only CPR is effective and recommended:

1. Call 911 (or have someone else call).
2. Place the person on their back on a firm, flat surface.
3. Kneel beside their chest. Place the heel of one hand on the center of their chest (on the breastbone, between the nipples). Place your other hand on top, interlocking your fingers.
4. Push hard and fast. Compress the chest at least 2 inches deep at a rate of 100~120 compressions per minute. The beat of “Stayin’ Alive” by the Bee Gees is the perfect tempo.
5. Do not stop until emergency services arrive or the person starts breathing.

Let your body weight do the work — keep your arms straight and push from your shoulders. Effective CPR is physically exhausting. If someone else is available, switch every 2 minutes.

What About an AED?

An AED (Automated External Defibrillator) is a device that can shock a heart back into a normal rhythm. They are found in many public places — airports, gyms, malls, offices.

If an AED is available, use it. They are designed for non-medical people and literally talk you through every step with voice prompts. You cannot do it wrong. Turn it on, follow the instructions, and it will tell you if a shock is needed. Continue CPR between shocks.

Choking: The Heimlich Maneuver

Choking is one of the most common emergencies, especially with young children and elderly adults. If someone is coughing forcefully, encourage them to keep coughing — they are getting air. Only intervene when the person cannot cough, speak, or breathe.

For Adults and Children Over 1 Year Old

1. Stand behind the person and wrap your arms around their waist.
2. Make a fist with one hand. Place it thumb-side against the abdomen, just above the belly button and below the ribcage.
3. Grasp your fist with your other hand.
4. Give quick, upward thrusts — like you are trying to lift them off the ground.
5. Repeat until the object is expelled or the person becomes unconscious.

If the person becomes unconscious, lower them to the ground and begin CPR. Each time you open the airway to give breaths, look in the mouth for the object and remove it if you can see it.

If You Are Choking and Alone

Make a fist and thrust it inward and upward against your abdomen, or press your abdomen forcefully against the back of a chair, counter edge, or railing. Call 911 even if you cannot speak — the dispatcher can trace your location.

Severe Bleeding: Direct Pressure Saves Lives

Uncontrolled bleeding can become life-threatening within minutes. Here is what to do:

1. Call 911 if the bleeding is severe.
2. Apply direct pressure. Grab the cleanest cloth available (a shirt, towel, gauze) and press it firmly against the wound. Do not remove the cloth even if blood soaks through — add more layers on top and keep pressing.
3. Elevate the injured limb above the level of the heart if possible (unless you suspect a fracture).
4. Apply a tourniquet only for life-threatening limb bleeding that cannot be controlled with direct pressure. Place it 2~3 inches above the wound (not on a joint), tighten until the bleeding stops, and note the time it was applied.

Never: Remove an embedded object from a wound. If something is stuck in the body (glass, metal, etc.), stabilize it in place with padding and get medical help.

Burns: Cool Water, Not Ice

Burns are extremely common in daily life — cooking, hot beverages, curling irons, sunburn. The treatment depends on severity.

First-Degree Burns (Redness, No Blisters)

These affect only the outer skin layer. Think mild sunburn or a brief touch of something hot.

• Run cool (not cold) water over the burn for 10~20 minutes. This is the single most important treatment step.
• Do not apply ice, butter, toothpaste, or any home remedy. These can worsen the injury.
• Apply aloe vera or a burn ointment after cooling.
• Take over-the-counter pain medication if needed.

Second-Degree Burns (Blisters)

These are deeper and produce blisters.

• Cool water for 10~20 minutes.
• Do not pop the blisters — they protect against infection.
• Cover loosely with a sterile, non-stick bandage.
• See a doctor if the burn is larger than 3 inches, or on the face, hands, feet, genitals, or a major joint.

Third-Degree Burns (White/Charred Skin)

These are medical emergencies. Call 911 immediately. Do not remove clothing stuck to the burn. Cover the area loosely with a cool, moist sterile bandage or clean cloth. Monitor for shock.

Recognizing a Stroke: Act FAST

A stroke occurs when blood flow to the brain is blocked. Every minute without treatment kills about 1.9 million brain cells. Quick recognition saves lives and prevents permanent disability.

Use the FAST method:

• Face: Ask the person to smile. Does one side of the face droop?
• Arms: Ask them to raise both arms. Does one arm drift downward?
• Speech: Ask them to repeat a simple phrase. Is their speech slurred or strange?
• Time: If you see any of these signs, call 911 immediately. Note the time symptoms started — this information is critical for treatment decisions.

Other stroke symptoms include sudden severe headache, confusion, vision problems, dizziness, or difficulty walking.

Allergic Reactions and Anaphylaxis

Mild allergic reactions (hives, itching, mild swelling) can be treated with over-the-counter antihistamines. But anaphylaxis is a life-threatening emergency.

Signs of Anaphylaxis

• Difficulty breathing or wheezing
• Swelling of the throat, tongue, or lips
• Rapid pulse
• Dizziness or fainting
• Widespread hives
• Nausea, vomiting, or diarrhea

What to Do

1. Call 911 immediately.
2. Use an epinephrine auto-injector (EpiPen) if available. Inject into the outer thigh, even through clothing. You do not need to be a medical professional to use one.
3. Have the person lie down with legs elevated (unless they are having difficulty breathing, in which case let them sit up).
4. Monitor their breathing. Be prepared to start CPR if they stop breathing.
5. A second dose of epinephrine may be given after 5~15 minutes if symptoms do not improve.

If you have known severe allergies, carry two EpiPens at all times and make sure people around you know where they are.

Sprains and Fractures

For suspected sprains or fractures, follow the RICE method:

• Rest: Stop using the injured area.
• Ice: Apply an ice pack wrapped in a cloth for 15~20 minutes at a time. Never apply ice directly to skin.
• Compression: Wrap the area with an elastic bandage — snug but not tight enough to cut off circulation.
• Elevation: Keep the injured area above heart level if possible.

Signs of a fracture that needs emergency care: Visible deformity, bone protruding through skin, inability to bear any weight, severe swelling, or numbness below the injury.

Building Your First Aid Kit

Every home should have a basic first aid kit. Here is what to include:

• Adhesive bandages in various sizes
• Sterile gauze pads (4x4 inches)
• Adhesive medical tape
• Elastic bandage (ACE wrap)
• Antiseptic wipes or solution
• Antibiotic ointment
• Tweezers and small scissors
• Disposable gloves (at least 2 pairs)
• Instant cold pack
• Thermometer
• CPR face shield or pocket mask
• Over-the-counter pain reliever (ibuprofen, acetaminophen)
• Antihistamine (diphenhydramine)
• Emergency blanket
• First aid instruction booklet

Store it somewhere accessible and check it every 6 months to replace expired items.

Get Proper Training

This article covers the basics, but there is no substitute for hands-on training. The American Red Cross and American Heart Association both offer first aid and CPR courses that typically take 4~8 hours and cost $25~$80. Many employers offer these courses for free.

Online refresher courses are available, but at least take one in-person class to practice on a mannequin. The physical practice makes a real difference when adrenaline is pumping in an actual emergency.

Final Thoughts

You will probably never need most of this knowledge. But if you do, you will be extraordinarily grateful you have it. First aid skills are like insurance — you hope you never need them, but when you do, nothing else matters.

The few hours it takes to learn these basics could be the difference between helplessly watching an emergency unfold and actually saving someone’s life. Take a course. Build a kit. Review this information periodically.

Because emergencies do not wait for someone more qualified to show up.