Blood stains respond to soaking in cold water. Follow with a cold water cycle in your washer with regular detergent. Repeat if necessary, do not allow the stain to dry.
The best way to get blood out of anything is to use perixode. It will get blood out of anything. Just put the perixode on the blood stain and let it soak. Do not rub it in but take a towel and blot the stain.
The sooner you notice and treat the blood stains the better. Never use hot water to wash them as it sets the color. Rinse with cold water and use soap.
Use common hydrogen peroxide. Apply a small amount of peroxide to the stain, immediately dab the area dry with a paper towel or rag. Repeat until stain is gone.