Chilli, sambal or hot oil in a child's eye: what to do first

A small hand touches a chilli, and a moment later the same hand rubs an eye. This page is the plain first-aid version for a Malaysian kitchen: what to do in the first minutes for chilli and sambal, why hot cooking oil is a different problem, and which signs mean an eye doctor the same day.

Why does chilli hurt so much in a child's eye?

Chilli hurts because its active ingredient, capsaicin, switches on pain receptors on the clear front window of the eye (the cornea). A review of the eye effects of pepper spray, which is made from the same chilli compounds, describes capsaicin as a "fat-soluble" substance that opens a pain channel (TRPV1) in the corneal nerves and also sets off inflammation. The result is stinging, watering and redness, and often an eye the child cannot open.

The same review says that capsaicin's "poor water solubility avoids damage to deeper corneal layers". In a controlled study of 47 cadets sprayed with pepper spray, every one had redness, pain and eyelid squeezing, about one in five had tiny scuffs on the corneal surface, and by one week these had healed and corneal sensation had returned.

Two cautions belong beside that. Pepper spray is a concentrated product, so these studies say nothing precise about a chopped chilli or a spoon of sambal. And the same review notes harm in other settings: sustained corneal abrasions in 7% of people sprayed at a 10% concentration in one study, and a case where late rinsing was followed by lasting loss of vision. Most of the literature is case reports. Chilli hurts a great deal, and quick rinsing is the step the sources stress.

What should I do in the first minutes?

Stop the rubbing, then rinse. The NHS advice for any eye injury is to "wash your eye with clean water if there's something in it" and "do not touch or rub your eye until it's better".

1. Stop the rubbing and wash the child's hands. Capsaicin dissolves in fat rather than water, so it can cling to skin, and a hand that has just touched chilli can carry it back to the face. Wipe or wash the hands under running water, with soap, so the other eye is not next.

2. Start rinsing straight away. The NHS says to use clean water that is not hot, from a tap or shower or from bottled water, to hold the eye open and to "run lots of water over your eyeball for at least 20 minutes", with a flow that is not too strong.

The pepper spray review gives 15 to 20 minutes of irrigation with water or normal saline as "the most important step". Saline from the first-aid kit works. Do not stop to look for it if tap water is nearer.

3. Take contact lenses out in an older child if the child wears them. Both sources say lenses should come out.

4. Check the eye afterwards. Look at whether the child can open the eye and see as usual. The signs further down decide whether a check is needed today.

How do I rinse a toddler's eye when they will not keep it open?

Let the water run across the eye and off the face, and use two adults if you can. These are practical ideas, not a published protocol; the aim is the NHS wording: lots of water, gentle flow, eye open.

• Lay the child on their back, with the head turned to the side so the affected eye is lower, and pour from a clean cup or bottle across the eye from the inner corner outwards. A towel under the head catches the water.
• If lying still is impossible, a gentle shower over the forehead lets water run down across the eye. Keep the pressure low.
• One adult holds the child and keeps the lids gently apart with clean fingers while the other pours. The lids will clamp shut because of the pain. A calm voice and a gentle hold work better than force.
• Rinse in short rounds if the child cannot manage one long one, and add up the minutes with a phone timer.

The pepper spray review also warns against an old habit: "blowing air into the patient's eyes" may worsen symptoms, so do not blow on the eye or fan it.

What should I not put in the eye?

Nothing except clean water or saline. Do not put milk, breast milk, oil, sugar water, herbal or traditional remedies, or someone else's eye drops in the eye.

Milk is a common home idea for chilli in the mouth. None of the sources read for this page recommends milk, oil or any other liquid for the eye; they recommend water or saline for 15 to 20 minutes or more. Someone else's eye drops were made for someone else's eye and carry medicine the child does not need.

Do not rub, and do not let the child rub, even if the eye feels gritty afterwards. The review says people whose corneas have lost some feeling are more likely to develop corneal ulcers "especially if they engage in eye rubbing". Do not wear or put in contact lenses until the eye is better, as the NHS says.

Is hot cooking oil different from chilli?

Yes. Hot oil is a heat burn, not a pain-receptor sting, and every hot oil splash near the eye needs a same-day eye check.

A 2026 study of children's eye burns from Poland explains why oil is a concern. It notes that "greases and oils are more adhesive than water-based fluids and therefore destroy deeper tissues", and that because heat also injures the skin, "closing the eyelid may not provide sufficient protection for the eyeball". Thermal burns were over-represented among the more severe cases in that small series. It is a small, retrospective study, so it shows a pattern to respect, not a rate.

First aid is similar in spirit. The study says rinsing after a thermal burn "helps to cool the eyeball", gives 15 minutes as the usual first-aid period, and says that tap water can be used because "irrigation should never be delayed by lack of an appropriate solution".

The NHS adds that a burn or scald on the face needs emergency care (A&E) and that you should not put creams, oils or butter on a burn or burst blisters. So: cool water on the eye, no ointment or home remedy, then go. Do not wait to see how it looks tomorrow.

When does chilli or oil in the eye need a same-day eye check?

Go the same day if the pain does not ease after a proper rinse, or if any of the following is true. The NHS says to seek urgent help if an eye injury "is not getting better after 24 hours", "it's very painful" or you are worried about a child, and the pepper spray review says moderate to severe symptoms and reduced vision call for an ophthalmologist.

• The pain does not ease after rinsing, or the child still will not open the eye.
• Vision is blurred, or the child holds one eye shut in bright light.
• A white or cloudy patch is visible on the eye.
• The eyelid is burned, blistered or swollen.
• It was hot oil, hot sauce straight from the pan, or any other hot liquid.
• It was not food. A cleaning product, drain cleaner or detergent is a chemical splash with different rules: the first sixty seconds after a chemical splash covers it, and rinsing starts at once.

If the child had a speck, sand or a bit of chilli skin that may still be on the eye, something in my child's eye has the steps for a foreign body. If the product was glue, see glue in the eye, which has the opposite rule for stuck lids. For other pain, when an eye that hurts needs a visit today is the broader guide. For a child under five, the NHS advises getting help rather than waiting; here, that means the nearest clinic or emergency department.

How do I stop it happening again in the kitchen?

Most of prevention is where things are put and when hands are washed. The Utah Health burn prevention page, written for kitchens, lists habits that fit a Malaysian one too.

• Cut chilli and make sambal away from the child. Wash hands with soap after handling chilli, and wash a child's hands after helping.
• Use the back burner where you can and "turn pot and pan handles inward", so they are not knocked or reached.
• Keep a "designated play area away from heat sources", with a responsible adult near the stove, and do not carry hot liquids over or near children.
• Keep children out of the kitchen while frying. A serious scald, the page notes, "can occur in under five seconds".

The household list in eye safety at home covers the other shelves.

Common questions

References

1. NHS · Eye injuries · www.nhs.uk
2. Quiroga-Garza et al. · Noxious effects of riot control agents on the ocular surface, Frontiers in Toxicology 2023 · pmc.ncbi.nlm.nih.gov
3. Torunska, Engelgardt and Szwajkowska · Chemical and thermal ocular burns in children, Clinical Ophthalmology 2026 · pmc.ncbi.nlm.nih.gov
4. NHS · Burns and scalds · www.nhs.uk
5. University of Utah Health · How to prevent burns and scalds at home · healthcare.utah.edu

By Dr Chan Li Yen. General information only. It does not replace a consultation. If you are worried about your child's eyes or vision, please see an eye doctor.