How to Remove Dried Blood from a Memory Foam Mattress illustration
Image: AI-generated by Stain Rescue Daily

Carpet & Upholstery

How to Remove Dried Blood from a Memory Foam Mattress

Dried blood on a memory foam mattress can leave a stubborn dark mark, but you can lift it with cold water and gentle dish soap. Here's a practical, surface-safe guide for dried stains, with memory foam-specific precautions.

Published August 18, 2026 Updated August 19, 2026 4 min read
Part 2: Which method fits

Here's a step-by-step method using cold water and dish soap, which is safe for memory foam.

  1. Mix a cleaning solution: In a small bowl, combine 1 cup of cold water with 1 teaspoon of gentle dish soap (like Dawn). Stir gently to mix.
  2. Dampen a clean cloth: Dip a white cloth or paper towel into the solution. Wring it out so it's damp, not soaking wet. Excess water can damage memory foam.
  3. Blot the stain: Gently blot the dried blood stain with the damp cloth. Work from the outside edges toward the center to prevent spreading. Do not rub or scrub.
  4. Let it sit: Allow the solution to sit on the stain for 5-10 minutes to help break down the blood proteins.
  5. Blot with cold water: Dampen another clean cloth with plain cold water and blot the area to rinse away the soap and loosened blood.
  6. Blot dry: Use a dry cloth or paper towel to blot up as much moisture as possible.
  7. Apply baking soda paste (optional): If the stain persists, make a paste of 2 tablespoons baking soda and 1 tablespoon cold water. Apply it to the stain and let it sit for 30 minutes. Then, gently scrape it off and blot with a damp cloth.
  8. Air dry completely: Allow the mattress to air dry completely before putting bedding back on. You can speed up drying with a fan, but never use a hair dryer or heater.

Fresh vs. Dried Blood Stains

Fresh blood is much easier to remove than dried blood. If the stain is fresh, blot immediately with a cold, damp cloth to absorb as much blood as possible. Then, follow the same steps above, but you may not need the baking soda paste.

For dried blood, the process takes longer and may require multiple attempts. Be patient and repeat the steps if needed.

What Not to Do

  • Never use hot water: Heat sets blood stains permanently.
  • Avoid scrubbing: Scrubbing can damage memory foam and push the stain deeper.
  • Don't soak the mattress: Excess moisture can lead to mold and mildew inside the foam.
  • Avoid harsh chemicals: Bleach, ammonia, and other strong cleaners can discolor or break down memory foam.
  • Don't use a steam cleaner: The heat and moisture can damage the foam.

Alternative Methods