Yarrow is great with all things blood related, from stopping a cut from bleeding to stimulating blood throughout your body, basically have a blood issue use Yarrow for it. It's also good for colds and flus because it's an antiviral and a antimicrobial. These are just the main uses for Yarrow but it's great to keep some on hand, even if it's just to help the swelling from a bug bite, which I'm currently using it for.