Dealing With Blood Stains
We can’t escape cuts and bruises in life, and sometimes they leave you with bloodstains on outfits or other surfaces to deal with. Sponge the affected area using water, and you want to avoid hot water because it will set the stain.
Follow through with a small amount of hydrogen peroxide applied to the stain directly. It should clear the stain, but you may have to reapply as needed in the case of stubborn or old stains. Rinse the area using water as soon as the bloodstain clears. ER nurses use this trick to get blood splatter out of their uniforms.