How to Remove Blood Stains from Carpet
Blood stains can happen from minor cuts, nosebleeds, or pet injuries. While they look alarming, blood stains are actually removable if you act quickly and use the right techniques. Here's our professional guide to removing blood from carpet.
🚨 Critical Rule: COLD Water Only!
Never use hot or warm water on blood stains. Heat causes the proteins in blood to coagulate and bond permanently to carpet fibers. Always use COLD water.
Remove Fresh Blood Stains
Step 1: Blot with Cold Water
Wet a clean white cloth with cold water. Blot the stain gently – don't rub! Work from the outside edges toward the center to prevent spreading.
Step 2: Apply Dish Soap Solution
Mix 1 tablespoon of dish soap with 2 cups of cold water. Apply to the stain with a clean cloth and blot gently. The surfactants in dish soap help lift the blood.
Step 3: Rinse and Repeat
Blot with a cloth dampened with plain cold water to rinse. Repeat the soap solution and rinsing until the stain lifts.
Step 4: Dry Thoroughly
Blot with dry towels and allow to air dry. You can place a fan nearby to speed drying.
Remove Dried Blood Stains
Dried blood is more challenging but not impossible:
- Scrape off dried blood – Use a dull knife to gently scrape away any dried surface blood
- Rehydrate the stain – Apply cold water and let it soak for 10-15 minutes
- Use enzyme cleaner – Apply an enzyme-based cleaner (designed for protein stains). These break down the blood proteins.
- Let it work – Allow 15-30 minutes for the enzymes to work
- Blot and rinse – Blot up the solution and rinse with cold water
- Repeat if needed – Stubborn dried stains may need multiple treatments
Alternative Methods
Salt Paste Method
Mix salt with enough cold water to make a paste. Apply to the stain, let it sit for 10-15 minutes, then blot and rinse. Salt helps draw out the blood.
Hydrogen Peroxide (Light Carpets Only)
For light-colored carpets only: Apply 3% hydrogen peroxide directly to the stain. It will bubble as it breaks down the blood. Blot and rinse with cold water. Warning: Test in a hidden area first – peroxide can bleach colored carpets!
💡 Pro Tip: Meat Tenderizer
Unseasoned meat tenderizer contains enzymes that break down protein. Mix with cold water to make a paste, apply to the stain for 30 minutes, then rinse. It works surprisingly well!
What NOT to Do
- Never use hot water – This permanently sets the stain
- Don't rub vigorously – This spreads the stain and damages fibers
- Avoid ammonia – It can set protein stains
- Don't use bleach on colored carpet – It will damage the color
Stubborn Blood Stain?
Some stains need professional enzyme treatments. We can help!
📞 (415) 756-9422When to Call a Professional
- The stain has dried and set for more than 24 hours
- DIY methods haven't fully removed the stain
- The stained area is large
- You have expensive or delicate carpet
- You're concerned about spreading the stain
Professional carpet cleaners have commercial-grade enzyme treatments and extraction equipment that can remove stains that home remedies can't touch.
Need help with a stubborn blood stain? Contact Boris Carpet Cleaning for a free quote. We've been removing tough stains in the Bay Area since 2004!