To remove a blood stain from fabric, blot the stain, soak the stain in cold water, wash the cloth according to the manufacturer's instructions and air dry the fabric. For a stubborn stain, soak the fabric in saline solution, and apply mild bar soap or hydrogen peroxide before laundering.
Using a clean, white towel, blot as much stain as possible from the fabric, taking care not to sink the stain into the fabric. Work from the edges of the stain towards the center to avoid spreading the stain to the surrounding areas of the fabric, and change towels as needed once they get saturated with blood.
Soak the fabric in cold water for a few minutes, add detergent to the water, and shake the fabric in the water to detach the stain from it. For a stubborn stain, soak the fabric in cold water overnight to allow ample time for the stain to break down. If the stain fails to disappear, soak the fabric in a solution of 1 cup salt and 2 quarts water for 30 minutes. If this fails to work, apply mild bar soap, and use your hands to rub the fabric together in order to work out the stain, and dab it with hydrogen peroxide if it still persists. Once the stain disappears, launder the fabric as normal, and air dry it.