Major Bleeding: What It Is and What to Do

It's Stop the Bleed Month, and we're going back to basics with one of the most important questions in trauma care: what actually qualifies as a major bleed?

Understanding the answer could save a life — yours or someone else's.

What Qualifies as a "Major Bleed"?

Major bleeding or massive haemorrhage is defined as bleeding that will rapidly become life-threatening. In practical terms, that means significant blood loss that the body cannot compensate for without intervention.

According to ANZCOR Guideline 9.1.1, bleeding should be treated as severe and life-threatening in the following situations:

• Amputated or partially amputated limb above the wrist or ankle
• Shark attack, propeller cuts, or similar major trauma to any part of the body
• Bleeding not controlled by local pressure
• Bleeding with signs of shock: pale and sweaty skin, pulse rate above 100, capillary refill greater than 2 seconds, or decreased level of consciousness

If any of these apply, you are dealing with a major bleed and need to act immediately.

Types of Bleeding

Not all bleeding looks the same. Understanding the source helps guide your response.

Arterial bleeding is the most dangerous. Bright red blood spurts rhythmically with the heartbeat due to the high pressure in arteries. This type of bleeding can become fatal within minutes.

Venous bleeding produces a steady flow of darker red blood. Less forceful than arterial, but still serious — particularly from larger veins.

Capillary bleeding is the slow ooze from tiny vessels near the skin's surface. Common in minor cuts and typically the easiest to manage with direct pressure.

Recognising these differences under pressure can be challenging, even for experienced first responders. That's why knowing how to respond — regardless of the source — is what matters most.

External vs Internal Bleeding

Bleeding presents in two forms: external, which is visible and usually immediately apparent, and internal, which may go unnoticed but can still be life-threatening.

External Bleeding

External bleeding is caused by cuts, punctures, abrasions, or trauma from accidents, falls, violence, or encounters with dangerous animals. Severe cases can include amputated limbs, penetrating chest wounds, abdominal punctures, or major trauma to any body part.

Warning signs of major external bleeding include:

• Rapid blood flow, pooling, or spurting

• Blood-soaked clothing

• Bleeding that cannot be controlled with direct pressure

• Signs of shock: dizziness, pale and sweaty skin, pulse rate above 100, or decreased consciousness

"The use of pressure on or around the wound is usually the fastest, easiest and most effective way to stop external bleeding." — ANZCOR Guideline 9.1.1

Internal Bleeding

Internal bleeding occurs inside the body, often affecting organs or cavities like the brain, chest, or abdomen. It can result from blunt trauma such as car accidents or falls, fractures, organ injuries, or complications of pregnancy.

Internal bleeding may not be visible at all. Warning signs include:

• Pain, tenderness, or swelling over or around the affected area

• Blood from a body opening: bright red or frothy blood coughed up, dark brown vomited blood, blood-stained urine, vaginal or rectal bleeding

• Signs of shock: pale, sweaty skin, rapid weak pulse, or confusion

"In life-threatening bleeding, control of bleeding takes priority over airway and breathing interventions." — ANZCOR Guideline 9.1.1

How to Manage Severe External Bleeding

ANZCOR Guideline 9.1.1 outlines a clear sequence for managing severe external bleeding:

Step 1: Apply direct pressure Apply firm, direct pressure to the wound using your hands or a pad. Maintain pressure until bleeding stops. Do not layer multiple pads — this absorbs blood without maintaining effective pressure. If bleeding continues, apply a second pad and a tighter bandage, ensuring it is placed directly over the bleeding point.

Step 2: Apply a tourniquet for severe limb bleeding If severe, life-threatening bleeding from a limb cannot be controlled by pressure, apply a commercial arterial tourniquet 5–10 cm above the wound but not over a joint. Tighten the windlass until the bleeding stops and note the time of application. If bleeding continues, apply a second tourniquet above the first. Do not remove the tourniquet once applied.

Commercial windlass tourniquets such as the SOF® Tourniquet and C-A-T® Gen 7 are significantly more effective than improvised alternatives.

Step 3: Use a haemostatic dressing for junctional wounds For severe bleeding from wounds not suitable for a tourniquet — such as the groin, armpit, or neck — apply a haemostatic dressing as close as possible to the bleeding point. Pack the wound tightly, apply firm manual pressure for a minimum of 3–5 minutes, and secure with a bandage. Do not remove the dressing.

QuikClot Combat Gauze is the most widely used haemostatic dressing in Australian military and first responder settings.

Step 4: Manage for shock and call for help Call Triple Zero (000) immediately. Lie the patient down, restrict movement, keep them warm, and monitor their condition while waiting for paramedics.

"The need to control the bleeding is paramount. The risks associated with the first aid use of tourniquets and haemostatic dressings are less than the risk of uncontrolled severe, life-threatening bleeding." — ANZCOR Guideline 9.1.1

How to Manage Suspected Internal Bleeding

Severe internal bleeding cannot be managed in the field — it requires urgent surgical care. Your job as a first responder is to recognise it, call for help, and keep the person stable until paramedics arrive.

ANZCOR advises the following:

• Call Triple Zero (000) immediately
• Lie the person down and assist them into a comfortable position
• Keep them warm
• Monitor vital signs frequently and treat for shock
• Do not give food, drink, or medications — surgery is likely needed
• If there is bruising to a limb without external bleeding, apply pressure and a cold pack if available
• If the person is unresponsive and not breathing normally, follow the Basic Life Support Flowchart and commence CPR

Do not delay getting help. Severe internal bleeding is life-threatening and time-critical.

"Severe internal bleeding is life-threatening and requires urgent treatment in hospital." — ANZCOR Guideline 9.1.1

Be Prepared, Not Scared

Preparation is key to being able to effectively manage bleeding emergencies. Having the right knowledge and gear gives you the best possible chance of making a difference. Direct pressure, wound packing, and tourniquet application are all skills that we believe every Aussie should learn and practise regularly.

A quality bleeding control kit should include a tourniquet, haemostatic gauze, pressure dressings, trauma shears, and gloves. Keep one in your car, your workplace, your bag, and your home.

Browse TacMed Training's public training courses to build your skills, and visit our YouTube channel for step-by-step video demonstrations.