Shock First Aid: Signs of Medical Shock, What to Do Before Help Arrives and What Not to Do

Quick answer: medical shock happens when the body’s organs are not getting enough blood flow. Warning signs include pale, cool or clammy skin, a fast weak pulse, fast or shallow breathing, restlessness or confusion, nausea, extreme thirst and weakness. Call 911 right away. Have the person lie down on their back, control any external bleeding, keep them from getting chilled, and do not give anything to eat or drink. Watch their breathing and be ready to start CPR if they stop breathing normally.

The word “shock” gets used loosely. People say they are in shock after bad news, and electrical shock is a separate injury entirely. Medical shock is something else: a condition in which blood flow to the body’s tissues and organs falls so low that they begin to fail. It is a medical emergency, and it can develop after injuries or illnesses that at first seem manageable.

You cannot treat the cause of shock at home. What a bystander can do is recognize it early, call for help quickly and keep the person as stable as possible until emergency responders take over. That is the focus of this guide, which belongs to our apartment emergency kit and preparedness guide.

Sources: American Red Cross, first aid guidance on shock and sudden illness; MedlinePlus (U.S. National Library of Medicine), “Shock”; National Heart, Lung, and Blood Institute (NIH), information on low blood pressure and shock; American Heart Association and American Red Cross First Aid Guidelines; CDC, “About Sepsis.” Checked November 2026. This article is general safety information, not medical advice. Call 911 in an emergency and follow the instructions of the dispatcher and responders.

What Medical Shock Is

The body needs a steady flow of oxygen-rich blood to every organ. MedlinePlus describes shock as a life-threatening condition that occurs when the body is not getting enough blood flow, which can damage organs and become fatal if it is not treated quickly.

Blood flow depends on three things working together: enough blood volume, a heart that pumps well and blood vessels that hold the right pressure. When one of those fails, shock can follow.

Common causes

MedlinePlus and NIH sources group the causes roughly like this:

Type	What goes wrong	Examples
Low blood volume	Not enough blood or fluid in the circulation	Heavy bleeding, severe burns, severe vomiting or diarrhea, dehydration
Heart-related	The heart cannot pump enough blood	Heart attack, heart failure, serious heart rhythm problems
Severe infection	Infection triggers a body-wide reaction that drops blood pressure	Sepsis, which the CDC calls a life-threatening emergency
Severe allergic reaction	Blood vessels widen and leak during anaphylaxis	Food, insect sting or medication allergies
Nerve-related	Injury disrupts the nerves that control blood vessel tone	Spinal cord injury

For a bystander, the cause matters less than the response. In every case, the steps are to call 911, treat what you can see, such as bleeding, and keep the person still and comfortable.

Warning Signs of Shock

The American Red Cross and MedlinePlus list similar signs. A person in shock may have:

• Pale, ashen or grayish skin, or a bluish tint to the lips and fingernails
• Skin that feels cool and clammy to the touch
• A rapid, weak pulse
• Rapid or shallow breathing
• Restlessness, anxiety, irritability or confusion
• Nausea or vomiting
• Excessive thirst
• Weakness, dizziness or fainting
• Decreasing alertness, leading to unresponsiveness

Early shock can look like anxiety or simple exhaustion. The person may say they feel fine. Pay attention to the situation as well as the symptoms: someone who has lost a lot of blood, has large burns, is having a severe allergic reaction or has a serious infection is at risk even if they still seem alert.

Signs can be harder to spot in some people

Older adults, people taking certain heart or blood pressure medications and young children may not show the classic fast pulse or obvious skin changes. Confusion or unusual sleepiness can be the main clue in an older adult. Trust the situation and call for help early rather than waiting for a full checklist of symptoms.

What to Do: Step by Step

These steps follow American Red Cross first aid guidance. They do not replace training, and a 911 dispatcher may give you different instructions based on what they hear.

1. Make sure the scene is safe. Check for traffic, fire, electrical hazards or other dangers before you approach.
2. Call 911 or have someone else call. Shock is always an emergency. Put the phone on speaker so you can follow the dispatcher’s instructions with your hands free.
3. Control any external bleeding. Apply firm, direct pressure with a clean cloth or dressing. For life-threatening limb bleeding, a tourniquet may be needed. Our Stop the Bleed basics guide covers pressure, wound packing and tourniquets.
4. Help the person lie down on their back. Lying flat helps blood reach the brain and vital organs and prevents injuries from a fall if they faint.
5. Consider raising the legs only if it is safe. Current first aid guidelines from the American Heart Association and American Red Cross note that raising the legs may help briefly when there is no sign of injury. Do not raise the legs if you suspect a head, neck, back, hip or leg injury, or if moving them causes pain.
6. Keep the person from getting chilled. Cover them with a blanket or coat. If they are lying on cold ground or a cold floor, place something under them if you can do so without moving them much. Avoid overheating.
7. Do not give food or drink, even if they ask for water. They may vomit or need surgery, and they may not swallow safely.
8. Loosen tight clothing at the neck, chest and waist.
9. Watch breathing and responsiveness until help arrives. Note any changes to tell responders.
10. Be ready to start CPR if the person becomes unresponsive and stops breathing normally. See our guide to Hands-Only CPR and AED basics.

If the person vomits

If the person vomits and you do not suspect a spinal injury, gently roll them onto their side so the vomit can drain from the mouth and they do not choke. If you must turn someone with a possible spinal injury, try to keep the head, neck and body in a straight line as you move them, ideally with help from another person.

Shock Alongside Other Emergencies

Shock rarely appears on its own. It usually comes with another injury or illness, and treating that problem is part of treating the shock.

Severe allergic reaction

If shock follows a severe allergic reaction and the person has a prescribed epinephrine auto-injector, help them use it, or use it yourself following the directions on the device, and call 911. Our guide to anaphylaxis first aid covers the signs and the auto-injector steps.

Severe burns

Large burns lead to heavy fluid loss and can cause shock even without bleeding. Cool smaller burns with cool running water as guidance directs, cover burns loosely with a clean dressing and keep the rest of the person warm. Our burn first aid guide covers what to do and what to avoid.

Electrical injuries

An electrical injury can cause burns, heart rhythm problems and shock at the same time. Never touch someone who may still be in contact with a power source. If the power source is still live, call 911 and wait for the utility or fire department to make the area safe before you approach.

Serious infection

The CDC describes sepsis as the body’s extreme response to an infection, and it can lead to septic shock. Warning signs the CDC lists include confusion, shortness of breath, high heart rate, fever or shivering or feeling very cold, extreme pain or discomfort, and clammy or sweaty skin. If someone with an infection shows these signs, call 911 or get emergency care right away and mention that you are concerned about sepsis.

What Not to Do

Well-meant actions can make shock worse. Red Cross and MedlinePlus guidance points to several things to avoid:

• Do not give anything by mouth, including water, alcohol or medication.
• Do not move the person unless they are in danger where they are, such as near fire, traffic or rising water.
• Do not raise the legs if you suspect a head, neck, back or leg injury.
• Do not put a pillow under the head if the person is lying flat and you suspect a neck injury.
• Do not leave the person alone if you can avoid it. Send someone else to meet responders.
• Do not wait to see whether symptoms improve before calling 911.

Getting Help to an Apartment Quickly

In a city building, the minutes between a 911 call and a responder reaching the patient often depend on access. Paramedics may need to get through a locked lobby, find the right elevator and locate the unit.

• Tell the dispatcher the full address, building entrance, floor and unit number.
• Send a neighbor or family member to the lobby to hold the door and the elevator.
• Leave your apartment door open or off the latch and turn on the lights.
• Move furniture or bikes out of the path from the door to the patient.
• Gather the person’s medication list, ID and insurance card if they are within reach.

Planning ahead helps even more. Keep a printed list of medications and conditions for everyone in your household near the door or in your emergency kit, and know whether your building has a doorman, an intercom code or a staff phone number that responders can use.

Supplies That Help in a Shock Emergency

You do not need special equipment to help someone in shock, but a few items in a small apartment first aid kit make the steps easier:

• Gauze pads, roller bandages and a pressure dressing for bleeding
• A commercial tourniquet, if you have been trained to use one
• An emergency blanket or a spare wool or fleece blanket
• Disposable gloves
• A CPR face shield
• Any prescribed epinephrine auto-injectors for household members with severe allergies
• A printed medication and medical history list

Taking a Class

The steps above are easier to remember after hands-on practice. The American Red Cross and the American Heart Association offer first aid, CPR and AED classes in person and in blended formats, and many fire departments and community centers host low-cost or free sessions. Stop the Bleed courses teach bleeding control in about an hour.

After Responders Arrive

When paramedics reach the person, step back and let them work, but stay nearby. They will want a short, clear account:

• What happened and roughly when it started
• Any changes you saw, such as the person becoming more confused or breathing faster
• What you did, including bleeding control, epinephrine use or CPR
• Known allergies, medical conditions and medications, if you know them

If you used a tourniquet, tell responders the time you applied it. If you gave an epinephrine auto-injector, hand them the used device. Afterward, take care of yourself as well. Helping in a serious emergency is stressful, and it is normal to feel shaken for a while. Wash your hands, replace any first aid supplies you used and restock your kit so it is ready next time.

Frequently Asked Questions

Is medical shock the same as emotional shock?

No. Emotional shock describes a reaction to upsetting news. Medical shock is a life-threatening drop in blood flow to the organs and needs emergency care.

Should I raise the legs of someone in shock?

Current first aid guidelines say raising the legs may help briefly if there is no sign of injury. Do not raise them if a head, neck, back, hip or leg injury is possible or if it causes pain.

Can I give someone in shock a drink of water?

No. Do not give food or drink. The person may vomit, choke or need surgery.

How quickly can shock become dangerous?

It can worsen in minutes, which is why calling 911 early matters even if the person still seems alert.

What should I tell the 911 dispatcher?

Give the exact address and unit, describe what happened, say whether the person is awake and breathing, and mention any bleeding, burns, allergies or known medical conditions.

The Bottom Line

Medical shock is an emergency that a bystander cannot fix, but early action helps. Call 911, stop any bleeding you can see, help the person lie flat, keep them from getting chilled and give nothing by mouth. Watch their breathing, be ready to start CPR, and make it easy for responders to reach your apartment quickly.