A tourniquet works by cutting off arterial flow above a wound, but it only works on a limb, and only above the injury. For bleeding in the trunk, the neck, or the point where a limb joins the torso, the standard response taught in courses such as Stop the Bleed and Tactical Combat Casualty Care (TCCC) is a different technique entirely: wound packing. It is unglamorous, it requires bare hands and real force, and it is one of the few field interventions with a well-defined, teachable procedure.
Wound packing means filling the wound cavity itself, directly against the source of bleeding, with gauze or a clean cloth, then holding firm pressure until a clot forms. Done correctly, it converts a wound that is actively losing blood into one that is mechanically compressed from the inside. Done loosely, or abandoned too early, it does close to nothing.
When Wound Packing Is the Right Technique
Wound packing is the answer for deep, non-extremity bleeding, and for extremity wounds where a tourniquet cannot be placed effectively — for example, a wound close to a joint or high on the thigh near the groin. Field guidance built around Stop the Bleed and TCCC principles frames it specifically for these deep or junctional injuries, where the bleeding source sits below the surface and pressure has to be delivered from inside the wound rather than across its opening. A surface dressing laid over a deep wound simply cannot reach the vessel that is bleeding; the pressure has to be packed down to meet it.
Plain Gauze or Hemostatic Gauze: The Two Options
Field kits generally carry one of two materials for this job:
- Plain gauze. Ordinary sterile gauze, often supplied as compressed or Z-fold rolls that expand into a long continuous strip once unpackaged, works by mechanical pressure alone. It is inexpensive and effective for most bleeding, but it does nothing to accelerate clotting on its own.
- Hemostatic gauze. This is gauze impregnated with a clot-promoting agent, most commonly kaolin or chitosan, built into products designed for combat and civilian trauma kits alike. Because it actively assists clot formation rather than relying on pressure alone, it is generally the preferred choice for severe or life-threatening bleeding when it is available.
Either material can be packed the same way. The difference is what happens chemically once it is in contact with the wound, not how it is applied.
The Steps: Packing a Wound Under Field Conditions
The sequence taught across hemorrhage-control courses follows a consistent structure:
- Confirm the scene is safe before approaching the injured person.
- Expose the wound. Cut or move clothing aside so the actual injury and the source of bleeding are visible — packing blind wastes time and material.
- Apply initial direct pressure with a gloved hand or gauze while preparing the packing material.
- Pack the wound tightly. Push the gauze directly into the wound cavity, starting at the deepest point and over the source of the heaviest bleeding, using fingers to drive the material in rather than laying it across the surface.
- Use real force. Loosely packed gauze will not generate enough pressure to stop bleeding; more than one dressing is often needed to fill the cavity completely, with the packing left extending slightly above the skin so it can be found and added to later.
- Hold firm, continuous pressure directly over the packed wound once it is filled.
- Secure it with a pressure bandage once bleeding is controlled, without disturbing the packing underneath.
Why the First Few Minutes Decide Everything
The instinct after packing a wound is to lift the pressure and check whether the bleeding has stopped. This is the most common way the technique fails. Firm, uninterrupted pressure needs to be held for a minimum of roughly three minutes to give a clot time to form and stabilize, with some field guidance recommending five minutes for a margin of safety. Lifting the dressing early to look disturbs the clot before it has set and can restart the bleeding from the beginning, forcing the whole process to be repeated.
If blood soaks through the outer dressing, the correct response is to add more gauze on top and increase pressure — not to remove what has already been packed. The original packing should stay in place until a clinician removes it in a controlled setting; pulling it out in the field, even once bleeding appears to have stopped, risks disturbing a clot that has only just formed.
A Technique, Not a Product
Programs that build field or outbreak-response kits, and the training curricula that accompany them, treat wound packing as a skill to be practiced under time pressure and with realistic resistance — not a step to be read once and remembered. The material in the kit matters less than whether the person applying it is willing to push firmly into a wound and hold still for the minutes that follow. That combination of adequate material and rehearsed technique is what separates a kit that looks complete from one that actually performs when a tourniquet is not the answer.