How do you remove blood stains from a mattress?

This is probably the easiest thing you could possibly do, and it's completely free..spit on it. Get a rag, or washcloth and spit right on the stain (only if it's your spit and yourblood) and rub with the rag/washcloth. You will start to notice the stain fading right away. And just keep doing this until it's gone. It should take less than a few minutes. Hope this helped. : )