Bleeding Control: Stop Severe Bleeding and Save a Life
Uncontrolled bleeding is the leading cause of preventable death in trauma. According to the American College of Surgeons, up to 40 percent of trauma-related deaths worldwide result from hemorrhage, and many of these deaths occur in the first few hours after injury — before the victim reaches a hospital. The Stop the Bleed campaign, launched by the White House in 2015 and led by the ACS in partnership with the Hartford Consensus, trains bystanders to recognize and control life-threatening bleeding using three core techniques: direct pressure, wound packing, and tourniquet application.
Scene Safety and Initial Assessment
Before approaching a bleeding victim, ensure the scene is safe. Look for hazards such as traffic, fire, broken glass, or armed individuals. Wear personal protective equipment, ideally medical-grade gloves, but if none are available, use plastic bags or multiple layers of cloth as a barrier. The CDC recommends standard precautions to reduce the risk of bloodborne pathogen exposure.
Identify the source of bleeding. Arterial bleeding appears bright red and spurts with each heartbeat. Venous bleeding is darker red and flows steadily. Capillary bleeding oozes slowly. Any bleeding that pools rapidly on the ground, soaks through clothing, or is accompanied by signs of shock — pale skin, rapid pulse, confusion — constitutes a life threat.
Direct Pressure: The First Line of Defense
Direct pressure is the simplest and most effective method for controlling external bleeding. Place a sterile gauze pad, clean cloth, or hemostatic dressing directly over the wound. Apply firm, steady pressure with both hands, using your body weight. Do not lift the dressing to check if bleeding has stopped; lifting disrupts clot formation. If blood soaks through, add more material on top and press harder.
The Mayo Clinic advises maintaining continuous pressure for at least 10 to 15 minutes before checking. For wounds on the scalp, apply pressure with the fingers rather than the palm to better conform to the curved surface. For wounds on the neck or torso, direct pressure is the primary method since tourniquets cannot be used.
Wound Packing for Deep Wounds
If direct pressure alone does not control bleeding from a deep wound, wound packing is the next step. This technique is particularly effective for junctional areas — the neck, armpit, shoulder, and groin — where tourniquets cannot be applied.
Using hemostatic gauze (impregnated with kaolin or chitosan) if available, or regular gauze, pack the material directly into the wound cavity, working layer by layer. Apply firm pressure to the packed material for at least 3 minutes. The goal is to fill the wound completely and maintain pressure to allow clotting. The ACS Committee on Trauma emphasizes that wound packing with hemostatic gauze is superior to standard gauze for life-threatening junctional hemorrhage.
Tourniquet Application for Extremity Bleeding
Tourniquets have undergone a major re-evaluation in recent years. The military’s experience in Iraq and Afghanistan, documented in studies published by the Journal of Trauma and Acute Care Surgery, demonstrated that early tourniquet application reduces mortality from extremity hemorrhage with minimal complications when used correctly.
Apply a tourniquet 2 to 3 inches above the wound, directly on the skin or over thin clothing. Never place a tourniquet over a joint (knee or elbow). Tighten the windlass until bleeding stops and the distal pulse is eliminated. Note the time of application. Commercial tourniquets such as the CAT (Combat Application Tourniquet) and SOFT-T (Special Operations Forces Tactical Tourniquet) are far more effective than improvised tourniquets.
The Stop the Bleed course teaches that a tourniquet applied early and correctly is a safe, effective intervention. The old teaching that tourniquets inevitably lead to limb loss has been disproven. Studies show that tourniquets can be safely left in place for up to 2 hours without permanent tissue damage.
Signs and Treatment of Shock
Severe bleeding can lead to hypovolemic shock, where the heart cannot pump enough blood to vital organs. Recognize shock by these signs: rapid, weak pulse; shallow, rapid breathing; pale, cool, clammy skin; thirst; nausea; and confusion or agitation. As shock progresses, the person may become unresponsive.
Keep the person lying flat and elevate the legs about 12 inches if no spinal injury is suspected. This is the Trendelenburg position variant recommended by the American Red Cross. Cover the person with a blanket or jacket to maintain body temperature. Do not give anything to eat or drink, even if the person is thirsty, because surgery may require an empty stomach. See our shock treatment guide for complete protocols.
Hemostatic Agents and Advanced Dressings
Hemostatic dressings contain agents that accelerate the clotting cascade. The most common types are kaolin-based (Combat Gauze), chitosan-based (Celox, HemCon), and zeolite-based (QuickClot). These dressings are designed for use in wounds where direct pressure alone is insufficient. Kaolin activates intrinsic clotting factor XII, chitosan bonds with red blood cells and platelets to form a physical seal, and zeolite concentrates clotting factors by absorbing water from the blood.
The Committee on Tactical Combat Casualty Care recommends hemostatic gauze as the standard for junctional hemorrhage control in tactical settings. For civilian use, hemostatic gauze is increasingly available in commercial trauma kits and is recommended by the Stop the Bleed program for deep wounds with active arterial bleeding. Pack the hemostatic agent directly into the wound and hold firm pressure for 3 minutes. Do not use hemostatic dressings inside the abdominal or chest cavities.
Bleeding from Specific Body Areas
Scalp wounds bleed profusely because the scalp is rich in blood vessels. Apply direct pressure with a sterile dressing and bandage firmly in place. Do not apply pressure if you suspect a skull fracture or depressed bone.
Nosebleed: Lean the person forward (not backward) to prevent blood from flowing down the throat, which can cause nausea and vomiting. Pinch the nostrils together continuously for 10 to 15 minutes. The Mayo Clinic advises seeking medical care if bleeding does not stop after 20 minutes.
Internal bleeding is suspected when trauma is followed by abdominal pain, tenderness, distension, bruising, vomiting blood, or dark tarry stools. Internal bleeding requires immediate surgical intervention. Transport the person to the emergency department without delay.
Frequently Asked Questions
How tight should a tourniquet be? Tight enough to stop all bleeding. If you can still feel a pulse below the tourniquet, it is not tight enough. The windlass should be twisted until bleeding stops completely. Pain from the tourniquet is expected.
Can I use a belt or rope as a tourniquet? Improvised tourniquets using narrow materials like belts, rope, or cord are significantly less effective than commercial tourniquets and can cause nerve damage. The ACS recommends dedicated commercial tourniquets. Maintain a tourniquet in every first aid kit. See our first aid kit guide for recommended supplies.
Should I clean a severe wound before bandaging? No. For severe bleeding, your priority is stopping the blood loss. Cleaning comes later in the hospital. For minor cuts and scrapes, rinse with clean running water and apply antibiotic ointment.
What is hemostatic gauze and how does it work? Hemostatic gauze contains agents like kaolin or chitosan that accelerate the clotting cascade. It is absorbed into the bloodstream safely. The Combat Gauze brand is widely used by the military and EMS. It is more effective than standard gauze for deep or arterial wounds.
When should I remove a tourniquet? Only a physician should remove a tourniquet. Once applied, leave it in place and transfer care to EMS. Removing a tourniquet after a clot has formed can cause massive rebleeding and worsen outcomes.
Bleeding in Children
Children have less total blood volume than adults — approximately 70 to 75 ml per kilogram of body weight. A small amount of blood loss that would be minor in an adult can represent a significant proportion of a child’s total volume. A 10 percent blood loss in a 15 kg (33 lb) child is only about 100 ml, yet it can trigger early signs of shock. Use the same techniques — direct pressure, wound packing, tourniquets — but apply them with awareness of the child’s smaller anatomy. Tourniquets designed for pediatric use are available, but a standard tourniquet can be applied to a child’s extremity with careful tightening. Reassure the child throughout, as fear and crying can increase heart rate and worsen shock physiology.
Conclusion
The Stop the Bleed campaign’s vision is that no one should die from uncontrolled bleeding before reaching the hospital. In the same way that CPR training has empowered millions to act during cardiac arrest, bleeding control training aims to make hemorrhage control a basic life skill. The three techniques — direct pressure, wound packing, and tourniquet application — are simple to learn and profound in their impact. The American College of Surgeons offers free Stop the Bleed courses across the country. Taking one could equip you with the skills to save a life in the critical minutes before help arrives. Keep a trauma kit in your car and home containing a tourniquet, hemostatic gauze, gloves, and scissors, and ensure family members know where it is kept.