Things You'll Need
Blood is one of the most common and stubborn stains to get out of upholstery and carpeting. Blood stains can also be made worse by trying to remove them the wrong way, which is why they are often tough to remove after the first clean. There are more effective ways of removing them, however, which give a better chance of successfully removing the stain.
Soak as much of the blood as you can up with paper towels. Apply a little pressure, and make sure that you get all the blood that you can onto the paper towels and off whatever it has spilled on. Using a blotting action to avoid spreading the blood stain.
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Pour a little cold water over the blood, which will help to wash some of it away. Again, soak up any runoff with paper towels.
Check the composition of the material to see what the cleaning instructions are. Often, certain materials will be vulnerable to color distortion if you use harsh chemical cleaners or bleach-based solutions.
Apply an enzyme-based cleaner. To check if a cleaner has any enzymes, simply check the back of the bottle, which will usually mention whether the solution is biological and contains enzymes or not. Also, some spot stain removers can be used, although you should first make sure that they won't ruin the color of your upholstery. The easiest way to tell is to test a tiny patch out of sight somewhere.
Wash the stained area with some more cold water. If the label dictates a preferential method of washing, then now is the time to do it. Often, upholstered materials will require dry cleaning only, although some are suitable for a cold wash with a washing machine. Some upholstery cannot even be removed, let alone put in a washing machine, and this will usually have to be simply cleaned as best you can where it is.