This is a test of commonsense. Complete the next sentence:

How to get out blood stains
Flush with cold water.
The first step with any fresh blood stain is to flush the stain with cold water. If it is a minimal amount of blood, you may be able to remove the majority of the stain with just cold water.
Run the fabric under a cold tap, gently rubbing the stain with the water. Soak your fabric in cold water in your sink to loosen any remaining stain.