Why must I use cold water on blood stains?

Blood is a protein. Hot or warm water at the start of treatment partially 'cooks' the protein into the fabric fibres, making the stain far harder to shift in later washes.

Will hydrogen peroxide damage coloured fabric?

3% hydrogen peroxide is generally safe on most coloured garments, but test a hidden seam first. Leave it on for 30 seconds and blot — if the colour transfers, switch to an enzyme remover instead.

My shirt already went through the dryer with a blood stain. Can it be saved?

Heat-set blood stains are significantly harder to remove, but not always impossible. Soak in cold water with an oxygen bleach product overnight, then rewash. Older or darker stains may need professional treatment.

Are enzyme stain removers better than hydrogen peroxide for blood?

Both work well on fresh blood. Enzyme removers with protease are often gentler on delicate fabrics and are our first choice at the facility when we are treating structured garments or fine knits.

When should I bring a blood-stained garment to a professional?

Bring it to us if the item is silk, wool, cashmere, or labelled dry-clean-only — or if you have already tried home treatment and the stain persists. The sooner you bring it in, the better the outcome.

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How to Remove Blood Stains from Clothes

How-toFebruary 16, 20264 min readBy Johnson Yu

Blood stains are one of the most common items we pre-treat at our Maple Ridge facility — whether it is from a sports injury, a cut, or a nosebleed, we see them arrive in our pickup bags every single week. The good news is that blood responds well to the right treatment, provided you follow one non-negotiable rule: keep heat away from the garment until the stain is fully gone.

Why Blood Stains Need Cold Water First

Blood contains protein, and protein changes structure when it is exposed to heat — much like an egg white goes from clear to white in a hot pan. Apply warm or hot water to a fresh blood stain and you are accelerating that bonding process, driving the stain deeper into the fabric fibres. Start every blood stain treatment with cold water, either a quick rinse under the tap or a short soak in a bowl.

If the stain is fresh, cold water alone sometimes lifts a surprising amount. Rinse from the back of the fabric when you can so you are pushing the stain out rather than pushing it further in.

The Two Best Home Treatments

Hydrogen Peroxide

The standard 3% hydrogen peroxide you find at any pharmacy is one of the most effective first-response treatments for blood. Apply it directly to the pre-rinsed stain and watch for a light foaming reaction — that tells you the peroxide is working. Let it sit for 15 to 30 minutes, rinse again with cold water, then launder as the care label directs.

One caution: do not leave peroxide on fabric for extended periods, particularly on darker garments, as it has mild bleaching properties. If you are unsure, test it on an inside seam first.

Enzyme Stain Remover (Protease-Based)

At our facility, we reach for a protease enzyme product when dealing with blood on structured or delicate garments. Protease enzymes specifically target and break apart protein-based stains. Apply the remover generously, work it into the fabric gently with your fingers, and allow it to sit for the dwell time listed on the product — usually 20 to 30 minutes. Then wash normally.

Dealing with Older or Dried Blood Stains

Dried blood stains that have not yet been through a dryer can still be treated at home, but they usually need more than one round. Soak the item in cold water first for 30 minutes to rehydrate the stain, then apply your hydrogen peroxide or enzyme remover and allow a longer dwell time. An overnight soak in cold water with powdered oxygen bleach is another effective option before the final wash.

If the garment has already been through the dryer with a blood stain, the heat will have partially set the protein. These stains are harder to remove but not always impossible — try the oxygen bleach soak first and repeat if needed.

What to Avoid

Do not rub aggressively, especially on delicate fabrics — tamping the product in with a soft cloth is more effective and less damaging than scrubbing. Do not reach for chlorine bleach on a blood stain; it is not the right tool and can weaken fabric fibres unnecessarily.

Most importantly, do not put the garment in the dryer, hang it in direct sun, or use any heat source until you have confirmed the stain is gone. Even a partially set blood stain becomes significantly more difficult to shift once heat has been applied.

When to Call Us

If the stained item is silk, wool, a structured blazer, or anything with a dry-clean-only label, bring it straight to us rather than attempting home treatment. These fabrics can react poorly to hydrogen peroxide or excessive moisture. Our team at the Maple Ridge facility handles blood-stained garments regularly and knows exactly which treatment approach suits which fabric type.

Stain already set? Drop it in your next pickup and flag it in the app — we'll pre-treat it before it goes through the wash.

Get started

The Laundry Brothers offers wash & fold and dry cleaning pickup across Greater Vancouver, seven days a week. See service areas →

Frequently asked questions

Why must I use cold water on blood stains?: Blood is a protein. Hot or warm water at the start of treatment partially 'cooks' the protein into the fabric fibres, making the stain far harder to shift in later washes.
Will hydrogen peroxide damage coloured fabric?: 3% hydrogen peroxide is generally safe on most coloured garments, but test a hidden seam first. Leave it on for 30 seconds and blot — if the colour transfers, switch to an enzyme remover instead.
My shirt already went through the dryer with a blood stain. Can it be saved?: Heat-set blood stains are significantly harder to remove, but not always impossible. Soak in cold water with an oxygen bleach product overnight, then rewash. Older or darker stains may need professional treatment.
Are enzyme stain removers better than hydrogen peroxide for blood?: Both work well on fresh blood. Enzyme removers with protease are often gentler on delicate fabrics and are our first choice at the facility when we are treating structured garments or fine knits.
When should I bring a blood-stained garment to a professional?: Bring it to us if the item is silk, wool, cashmere, or labelled dry-clean-only — or if you have already tried home treatment and the stain persists. The sooner you bring it in, the better the outcome.