Here’s the scariest part: according to the American Red Cross, a person can die from severe blood loss in less than 5 minutes. That’s faster than most people expect. If someone near you gets a serious injury to an arm or leg — think deep cut, crush injury, or something that’s bleeding hard and won’t stop — time matters immediately.
The go-to tool for that situation is a tourniquet. Both the American Red Cross and Mayo Clinic confirm that tourniquets are effective for controlling life-threatening bleeding on a limb — but both also add the same important qualifier: they should only be used if you’re trained in how to use one.
The Red Cross says to apply direct pressure and a tourniquet (if trained) at the same time for life-threatening limb bleeding. These two things work together — don’t wait to try one before the other.
Here’s something worth knowing: sources disagree on improvised tourniquets, like using a belt or scarf. The Mayo Clinic explicitly says NOT to use an improvised tourniquet. Military history includes cases where improvised options were used when nothing else was available, but medical experts do not recommend this for untrained civilians — and doing it wrong can cause serious harm. The clear takeaway: a proper medical tourniquet used by a trained person is always the right answer. There is no safe DIY shortcut here.
The most important thing you can do right now — before any emergency — is get trained. A free Stop the Bleed course will teach you the real technique in under an hour. That’s what actually makes the difference when it counts.