How to Remove Dried Blood from a Mattress: A Step-by-Step Guide

Here's a proven method for removing dried blood from a mattress. Work in a well-ventilated room and test any solution on a hidden area first.

1. Mix a cold water and dish soap solution. In a small bowl, combine one cup of cold water with a few drops of mild dish soap (like Dawn). Stir gently to mix.
2. Dampen a clean cloth with the solution. Wring it out so it's damp, not soaking wet. You don't want to saturate the mattress.
3. Blot the stain. Gently blot the dried blood stain with the damp cloth, working from the outside edges toward the center. This helps prevent spreading. Continue blotting until the stain starts to lift.
4. Rinse with cold water. Dampen another clean cloth with plain cold water and blot the area to remove any soap residue.
5. Blot dry. Use a dry towel to blot the area and remove excess moisture. Press firmly to absorb as much water as possible.
6. If the stain remains, use hydrogen peroxide. Test a small, hidden area first. If the fabric is colorfast, apply a small amount of 3% hydrogen peroxide directly to the stain using a cotton ball or clean cloth. Let it sit for a few minutes—it will bubble as it works.
7. Blot and repeat. Blot the area with a clean cloth to lift the stain. Repeat if needed, but don't overdo it—too much peroxide can damage the mattress.
8. Rinse and dry thoroughly. After using hydrogen peroxide, blot with cold water to remove any residue, then dry with a towel. Allow the mattress to air dry completely before making the bed.

What Not to Do

• Don't use hot or warm water. Heat sets blood proteins, making the stain permanent.
• Don't scrub. Scrubbing can damage the mattress fibers and spread the stain.
• Don't use bleach. Bleach can discolor the mattress and may not be safe for all fabrics.
• Don't soak the mattress. Excess moisture can lead to mold and mildew.

Fresh vs. Dried Blood

If the blood is fresh, you can often remove it with just cold water and dish soap. Blot the stain immediately, then follow steps 1-5 above. Fresh blood is much easier to lift than dried blood.

For dried blood, you may need to use hydrogen peroxide or an enzymatic cleaner. Enzymatic cleaners are designed to break down proteins and can be very effective. If you choose an enzymatic cleaner, follow the product's instructions and test on a hidden area first.

Alternatives and Additional Tips

If dish soap and hydrogen peroxide don't work, try a paste of baking soda and cold water. Apply it to the stain, let it dry, then vacuum it up. This can help absorb any remaining residue.

Another option is to use a commercial stain remover designed for blood. Look for one that is safe for use on mattresses and follow the label directions.