Carpet & Upholstery
How to Remove Dried Blood from a Mattress: A Step-by-Step Guide
Dried blood on a mattress can leave a stubborn dark mark, but you can lift it with cold water, dish soap, and hydrogen peroxide. Here's a practical guide for dried stains, with mattress-specific precautions.
Finding dried blood on a mattress is unsettling, but it's a common problem. Whether it's from a nosebleed, a small cut, or an accident, dried blood can set into the fabric and become harder to remove. The good news: with the right approach, you can often lift the stain without damaging your mattress.
This guide focuses on dried blood on a mattress. We'll cover what to do first, step-by-step instructions, what to avoid, and when to call a professional. We'll also explain why cold water is essential and how hydrogen peroxide can help—but only when used carefully.
Readers may also find How to Remove Hard Water Spots from a Stainless Steel Sink, How to Remove Coffee from a Silk Scarf: Fresh and Dried Stains, and How to Remove Ketchup from a Cotton T-Shirt: Fresh and Set-In Stains useful. For more stories like this, browse our Surface Safety section.
Why Dried Blood Is Tricky
Blood contains proteins that bind to fabric fibers. When blood dries, these proteins set, making the stain more stubborn. Heat—like warm or hot water—can cook the proteins and make the stain permanent. That's why you should always use cold water for blood stains.
On a mattress, the challenge is that you can't just toss it in the washing machine. You need to treat the stain in place, using gentle blotting and careful application of cleaning solutions.
What to Do First
If the blood is already dried, don't scrub. Scrubbing can push the stain deeper into the mattress and damage the fibers. Instead, start by gently scraping off any dried flakes with a dull knife or the edge of a spoon. Be careful not to tear the mattress fabric.
Next, blot the area with a clean, dry cloth to remove any loose particles. Do not use water yet—we'll get to that in the steps below.