How to clean vomit from a mattress

What to check before you start

• Whether the vomit is still wet or has already dried, and roughly how large the area is
• Whether it reached the mattress itself or was stopped by a removable cover or protector — those follow their own care label, not covered here
• What the mattress is, if you know: maker, model and main construction (foam, pocket-sprung, natural fillings, or a mix)
• The mattress's care label, the maker's instructions and your warranty terms
• Whether anything has already been used on the mark, and what
• Disposable gloves if you have them, a spoon or blunt edge for solids, and clean, dry towels or cloths
• If illness may be involved, follow current health guidance rather than relying on this cleaning guide for infection-control advice

Mattress care varies by construction, model and maker, so we've kept this to what's genuinely documented rather than one universal method. We read published care guidance from several UK and European manufacturers, including Simba, Silentnight, Dreams, TEMPUR and Hypnos, on 22 September 2026 — most of it covering spills and stains generally, not vomit specifically, so we've applied it cautiously. We haven't physically tested any mattress or method ourselves.

Does mattress construction change what's safe to try?

What your mattress is made from changes what's safe to try more than any single cleaning step does — check your care label or the maker's own guidance before you start.

Foam and memory foam. TEMPUR says its material can't be washed, sponged or dry cleaned, since soaking risks irreversible damage and may affect your guarantee; spot-clean gently without saturating it, then air dry. Dreams warns separately against ever steam-cleaning memory foam, since heat and trapped moisture together can break down its structure and lead to mould.

Pocket-sprung and natural-filling mattresses. Hypnos's guidance is stricter: dry towels only for spills, no detergents or chemical cleaners (it says they may bleach or disintegrate the fabric), no vacuuming in routine care, and never steam — moisture can reach the springs and cause rust, or mould in slow-drying deeper layers.

Removable, washable covers. Makers including Simba and Emma allow the cover to be washed separately, but at maker- and panel-specific temperatures — Simba's is a maximum of 40°C on a reduced spin; Emma splits 60°C for the top and bottom panels from 40°C for the side. Follow your own cover's label rather than assuming one temperature applies.

Makers genuinely disagree on mild detergent, too: Simba and Dreams describe a little on a cloth for spot-treating a mark; Hypnos rules it out altogether, and Silentnight's own guidance is internally inconsistent. We're not treating mild detergent as something every mattress can take.

What to do while the vomit is fresh

1. Check your mattress's construction and care guidance firstLook at the care label, any maker documentation and your warranty terms before doing anything else. What's safe depends heavily on the construction.
2. Remove the solids carefullyUse a spoon, card or a blunt edge to lift solid material away, rather than pressing it further in.
3. Blot the liquid, without rubbingPress clean, dry towels onto the wet area, using a dry part each time. Rubbing can spread the mark and push liquid deeper.
4. Pause before adding anythingOnce you've lifted and blotted what you can, check your mattress's guidance before adding water or a product.
5. Use only what your mattress's guidance permitsIf a product or a little moisture is allowed, use as little as you can, applied to a cloth rather than poured on, and try it on a hidden area first.
6. Let air reach the mattressLeave it uncovered in a well-ventilated room, and don't make the bed while it's still damp.
7. Reassess once it's completely dryJudge the result dry, not while damp. A mark or smell may not disappear completely.

What changes once it's dried?

Dried vomit isn't a fresh spill, and soaking it straight away isn't the safest starting point. Begin by looking at what's left: a crust or flakes, a mark, a smell, or some combination.

Lift what will safely come away dry first, such as a crust lifted with a spoon or blunt edge, before any moisture goes near it. Whether vacuuming suits your mattress depends on the maker's guidance; some advise against it in routine care.

Don't automatically re-wet the area — it puts liquid back into layers that may already be slow to dry. If your maker allows a product or a little moisture, use as little as you can, on a cloth, after a hidden-area test.

Be realistic: a mark or smell from something left to dry may not disappear completely, however careful you are.

What can you safely use?

Plain water and a damp cloth. The one thing every source we checked agrees on: damp, not wet, and never poured or sprayed directly onto the mattress.

Mild detergent or soap. Conditional, and genuinely contested between makers (see construction, above) — check your own mattress's guidance.

Enzyme-based cleaners. Sometimes suggested for organic stains and odours generally, but we found no evidence specific to vomit on a mattress. We mention it; we don't recommend it as an established method.

Bicarbonate of soda, dry only. A few makers describe it as a general freshening sprinkle, later vacuumed up — not stain removal, and never a wet paste or mixture.

Vinegar, hydrogen peroxide, bleach and alcohol-based or disinfectant products. Common in general cleaning advice, but no mattress-manufacturer guidance we found recommends any for vomit, and some makers warn against chemical cleaners and bleach directly. No recipe or dilution given.

What about the smell?

A lingering smell after vomit on a mattress is common enough — airing and thorough drying are the two things every source we checked agrees actually help, and there's no shortcut that replaces them.

A few makers, including Dreams and IKEA, describe a dry bicarbonate sprinkle, left for a while then vacuumed up, as general freshening rather than odour removal, and it isn't a substitute for drying the mattress properly first.

We don't say any product or step here sanitises the mattress, disinfects it or removes germs — that's a different claim from freshening the smell, and it's not one the sources we checked make about this specific situation either. If a smell is still there once the mattress is completely dry, that's a different problem from a fresh accident, and our guide on why mattresses can smell covers it separately, including when a musty smell is worth taking seriously.

Should you use a machine or steam cleaner?

Not automatically. A carpet cleaner, spot cleaner or extraction machine adds liquid as well as removing it, and the machine instructions we've seen list carpets, fabric upholstery and car interiors, not mattresses.

A wet-and-dry vacuum isn't a standard recommendation either, for the same reason.

Steam is the one we'd lean away from generally: TEMPUR, Dreams and Hypnos each independently warn against it for their own construction (see above), and none actively recommends it for any mattress.

This doesn't mean a machine can never help, only that we haven't found one established as suitable for mattresses generally. Check your own mattress's guidance and the machine's own instructions.

When to stop

Stop, or pause and reassess, if:

• The mattress is getting wetter with each attempt, rather than drier.
• Repeated, careful attempts aren't improving the mark or the smell.
• You're not sure what the mattress is made from, or what has already been used on it.
• Your mattress's guidance rules out the method you were about to try.
• The affected area is large, or the liquid seems to have soaked in deeply.
• A smell returns once the mattress seems dry — a reason to reassess, not to add more product.
• The situation involves more than a careful spot clean can reasonably handle.

Judge the result once the mattress is completely dry rather than while it's still damp. Complete removal isn't guaranteed, and a second attempt isn't automatically the next step.

If something remains, your mattress maker's customer support is a reasonable next step — they know the construction and their own guidance. For a large amount, or a mark or smell that persists, a professional cleaner may be worth considering; check your warranty terms first, since some makers restrict liquids, steam and chemicals. We can't say a professional gets a better result.

Related guides

If the smell is what remains once dry, our guide on why mattresses can smell covers that separately. If this happened on a carpet, a sofa or a car seat instead, see how to clean vomit from carpet, how to clean vomit from a sofa or how to clean vomit from a car seat. You can also browse the Mattresses section →