The most important step, to remove blood stains from clothes, is to treat the area quickly. Take the contaminated article of clothing, and rinse it with COLD water. When caught soon enough, simply running water over the area can sometimes be enough to remove the stain. When this is not possible, gently blot the clothes in cold water. Be careful not to rub the stain into the fabric! Spread the area, stretching the fibers, by pushing outward with your thumbs. This will cause the “still wet” proteins of blood to come loose . Again, the blood stain, if treated quickly, will not leave a permanent mark! So be quick!
Never use hot water on stains of blood, because the heat makes the blood set, (like paint), and makes it impossible to remove. Never put clothes with blood stains in the dryer before the blood stains were completely removed, again, the heat will set the blood. In desperate cases, use bleach, or a mixture of lemon and salt. If the blood has coagulated on the fabric, loosen the clot by soaking and then treat the stain.
In all cases, make sure to soak the clothing in cold water for at least half an hour before washing. Afterward, other methods are to rub with soap. Then wash the clothes in cold water with heavy detergent. Make sure to check before putting it in the dryer to make sure that the bloodstains are gone!
As a last resort, soak the stained clothing in warm water with an enzymatic cleaner to loosen the stain. Make sure the water isn’t HOT, just lukewarm. Soak for at least an hour, then check to see if the stains of blood have cleared. Then, wash the garment in cold or lukewarm water. Larger stains should be washed after soaking to remove the blood as much as possible before washing.
Hydrogen peroxide is also a very effective method for removing blood stains. However, before you begin it is advised to test with a patch first to ensure that the peroxide will not change the color in the clothing to change. Pour hydrogen peroxide on the area of the blood stain so that it foams for a few minutes. Then wipe the area and rub lightly. It is not uncommon that older blood stains may require repeated doses of hydrogen peroxide.