How does spray-on hemostatic powder stop bleeding?

Spray-on hemostatic powder stops bleeding by clumping blood cells together, like a sticky glue.

Imagine you're playing with your favorite toy, and you accidentally cut your finger. Blood starts flowing out, it's like a river running from your finger. Now imagine you have a special powder that you spray on the cut. This powder is full of tiny particles that grab onto blood cells when they come into contact.

When the powder lands on the wound, each particle acts like a little friend who finds a blood cell and holds hands with it. Soon, many of these little friends are holding hands with many blood cells, creating a big clump, like a crowd of kids all holding hands in the playground. This clump gets bigger and bigger until it blocks the flow of blood, just like how a crowd can stop a running stream.

Once the blood is blocked, the bleeding slows down and finally stops, so you can go back to playing with your toy, no more ouch!