How to Make Pepper Spray Stop Burning

Capsaicin, the active compound in pepper spray, binds to pain and heat receptors in your skin and mucous membranes, and no rinse or remedy will make the burning vanish instantly. The realistic goal is to reduce the intensity and shorten the duration. Flushing exposed eyes and skin with large volumes of cool water is the most widely recommended first response, and research on secondary treatments like milk and liquid antacids has produced mixed but sometimes encouraging results. Most people find the worst of the pain subsides within 30 to 60 minutes with decontamination, though lingering discomfort can last longer.

Why Pepper Spray Burns So Intensely

Pepper spray’s key ingredient is oleoresin capsicum, an oily extract of hot peppers. The capsaicinoids in that extract latch onto a receptor called TRPV1, which your body normally uses to detect dangerously high temperatures. When capsaicin binds to this receptor, it locks the channel into an open state, essentially tricking your nervous system into believing the tissue is being burned by heat even though no actual thermal damage is occurring.¹ That is why the sensation feels identical to a real burn and why your eyes reflexively clamp shut and flood with tears.

One critical detail about capsaicin’s chemistry shapes everything that follows about treatment: it is fat-soluble and has very limited water solubility. Commercial pepper sprays actually use alcohol or other organic solvents as a base precisely because capsaicin does not dissolve well in water.² This is why simply standing under a shower, while soothing, does not wash capsaicin away the way it would wash away a water-soluble irritant. Water cools the tissue and provides temporary relief, but it does not efficiently dissolve and carry away the oily residue clinging to your skin.

What to Do in the First Minutes

Before worrying about which rinse agent is best, handle the basics. Move to fresh air if you were sprayed in an enclosed space. Capsaicin particles can hang in the air and continue irritating your lungs and eyes with every breath. If you are outdoors, position yourself so the wind is blowing the residual mist away from your face, not into it.

Remove contaminated clothing as soon as you can. Pepper spray soaks into fabric, and the residue can re-expose you or spread to new skin every time the cloth shifts against your body. Handle the clothing by edges or unexposed areas to avoid transferring capsaicin to your hands. If you wear contact lenses, remove them immediately and discard them. Research on commercial pepper sprays has found that the carrier solvents can physically damage soft contact lenses, and a contaminated lens sitting on your cornea only prolongs and worsens the exposure.³

Resist the urge to rub your eyes or touch your face. Your hands are almost certainly contaminated, and rubbing drives the oily capsaicin deeper into the tissue and spreads it to areas that may not have been directly sprayed. Blinking rapidly into a stream of clean water is far more effective than rubbing.

Flushing Your Eyes

Your eyes are the most sensitive tissue pepper spray contacts, and they deserve priority. Flush with cool, clean water for at least 15 to 20 minutes. Tilt your head so the water runs from the inner corner of the eye outward, which prevents contaminated runoff from flowing into the other eye if only one side was hit. If you have access to a dedicated eye-wash station, use it. A gentle stream from a faucet or a squeeze bottle works in a pinch; the key is volume and duration, not pressure.

A study of 100 pepper spray exposure cases found that seven patients had sustained corneal abrasions, a rate the authors called “not rare.”⁴ A separate controlled exposure study reported that about one in five eyes showed small areas of surface erosion shortly after being sprayed, though those changes resolved within a week.⁵ The practical takeaway is that while most eye exposures heal on their own, corneal damage is a real possibility, and thorough flushing reduces the duration of contact that could cause it.

After flushing, if your vision remains blurry, you see halos around lights, or your pain does not steadily improve over the next hour, you should see a doctor. Corneal abrasions left untreated can become infected, and a brief exam with a special dye can rule out or confirm damage that you cannot assess on your own.

Treating Your Skin

For exposed skin, start with cool running water. An older study comparing household remedies for capsaicin burns on hands found that cool water immersion provided the most immediate relief, while vegetable oil offered better long-term pain reduction.⁶ That finding makes sense given capsaicin’s chemistry: cool water soothes the overactivated heat receptors in the short term, while an oily substance can help dissolve and lift the fat-soluble capsaicin off the skin over time.

A practical approach is to start with water to knock down the peak pain, then gently wash the area with a mild dish soap or a soap with a high surfactant content. Because capsaicin behaves like a grease, a degreasing soap can help break the oily film in much the same way dish soap cuts through cooking oil. Wash gently, rinse thoroughly, and repeat. Avoid hot water, which opens pores and can intensify the burning sensation by further activating those heat-sensitive receptors.

After washing, pat the skin dry rather than rubbing. If the burning persists, some people find relief by applying a thin layer of vegetable oil or a gentle lotion, leaving it on for a few minutes, and then washing it off. The idea is to give the capsaicin something fat-soluble to migrate into, then remove both together.

The Milk Question

Milk is probably the most commonly recommended home remedy for capsaicin burns, and the evidence is a bit more nuanced than “milk fixes everything.” Research on oral capsaicin burn found that milk was the most effective beverage tested at reducing the sensation of heat in the mouth, outperforming water, soda, and several other options. Interestingly, skim milk performed about as well as whole milk, leading the researchers to suggest that the protein in milk, rather than the fat, may be doing most of the work.⁷

That study, though, was about capsaicin in the mouth from spicy food, not pepper spray on skin or in eyes. The oral cavity’s mucous membranes behave differently from the tougher outer layer of skin, and the delivery method matters: eating a hot pepper is not the same as being hit with a pressurized aerosol. Milk is safe to pour over irritated skin and will not make things worse, but the evidence for its superiority over plain water on skin specifically is less robust than internet advice often implies.

If you do use milk on your skin, whole milk is a reasonable choice since it offers both fat and protein. Pour it over the affected area rather than soaking a cloth, which would just sit against the skin. Follow up with a soap-and-water wash to remove both the milk residue and any capsaicin it helped loosen.

Liquid Antacids as a Treatment

An unexpected contender in the pepper spray treatment arena is liquid antacid, specifically the magnesium-aluminum hydroxide suspensions sold under brand names like Maalox. A controlled study compared this type of antacid directly to saline on capsaicin-exposed skin and found that pain scores were significantly lower in the antacid group at 10, 20, and 30 minutes after application.⁸ A separate poison center study reported that about 70 percent of callers who tried topical antacid application described meaningful pain relief, with the treatment working best when applied early after exposure.⁹

These results led some emergency departments and protest medics to adopt a “LAW” mixture (liquid antacid and water, typically half and half) as a go-to rinse. The idea has real research behind it, but there is also a study that complicates the picture considerably.

The Study That Found No Treatment Beat Water

A randomized controlled trial exposed 49 law enforcement trainees to actual pepper spray during a training exercise and then assigned them to one of five treatments: aluminum hydroxide-magnesium hydroxide (Maalox), two-percent lidocaine gel, baby shampoo, milk, or plain water.¹⁰ Pain decreased over time in every group, but there was no significant difference between any of the treatments. Maalox did not beat water. Milk did not beat water. Even lidocaine, a topical anesthetic, offered no measurable advantage.

This is a genuinely important finding and one that a lot of well-meaning first-aid advice ignores. It suggests that the passage of time may be doing most of the heavy lifting in pepper spray recovery, and the specific substance you rinse with matters less than the act of rinsing itself and simply waiting. The study was modest in size, and it measured pain from full-face pepper spray exposure during an intense, adrenaline-charged scenario, which may differ from calmer clinical settings. Still, it is the best randomized trial available on this exact question, and it landed on a humbling result: no magic remedy clearly outperformed plain water.

How do you square this with the antacid studies that found a benefit? The earlier antacid studies used purified capsaicin rather than commercial pepper spray, which contains additional irritants and carrier solvents. They also used saline as the comparison rather than water applied by active rinsing. It is possible that antacid works better against capsaicin in isolation but offers no extra advantage once you are dealing with the full chemical cocktail of a commercial spray. It is also possible the randomized trial was simply too small to detect a modest benefit. The honest answer is that the evidence is genuinely mixed, and the safest conclusion is that thorough rinsing with any clean liquid helps, and no single treatment has been proven clearly superior in a real-world pepper spray scenario.

Things That Do Not Help or Make It Worse

A few common instincts are worth correcting. Hot water amplifies the burn. Since TRPV1 responds to both capsaicin and actual heat, warming the tissue is like adding fuel to the fire. Stick with cool or lukewarm water.

Rubbing alcohol sometimes comes up as a suggestion because capsaicin is soluble in organic solvents. While this is technically true, applying alcohol to irritated or abraded skin causes its own intense sting, and around the eyes it is outright dangerous. The momentary improvement in dissolving capsaicin is not worth the secondary chemical burn.

Petroleum jelly and thick creams can trap capsaicin against your skin rather than helping remove it. You want to dissolve and wash the compound away, not seal it in. Oil-based remedies should always be followed by a thorough soap-and-water rinse.

Bleach solutions have circulated online as a decontamination method. Do not use bleach on your skin or anywhere near your eyes. Capsaicin exposure is temporary; chemical burns from bleach can cause permanent damage.

When to Get Medical Attention

Most pepper spray exposures resolve without professional treatment. The burning typically peaks in the first few minutes and drops substantially within 30 to 45 minutes of decontamination, with residual irritation fading over the next few hours. However, certain situations warrant a trip to the emergency department:

Breathing trouble: Wheezing, chest tightness, or difficulty catching your breath after inhaling pepper spray can indicate bronchospasm, especially in people with asthma or other lung conditions.
Eye symptoms that worsen or persist: If vision is still blurry several hours after flushing, or you notice increasing redness and light sensitivity, you may have a corneal abrasion that needs treatment.⁴
Blistering or severe skin reactions: While uncommon, prolonged or concentrated exposure can cause contact dermatitis or blistering that benefits from medical care.
Pre-existing conditions: People with heart disease, severe asthma, or COPD should be evaluated even if symptoms seem manageable, because the stress response and airway irritation from pepper spray can exacerbate underlying conditions.

For severe eye exposure, an emergency physician can perform a fluorescein dye test to check for corneal damage that is invisible to the naked eye. This is a quick, painless exam, and it can catch abrasions that would otherwise go untreated and risk infection.

How Long the Burning Lasts

The timeline varies by the concentration of the spray, the area exposed, and how quickly decontamination begins. As a rough guide, intense burning on exposed skin usually lasts 20 to 45 minutes with active rinsing. Eye pain is often the most severe and longest-lasting component, sometimes persisting at a lower intensity for several hours. Skin that was not decontaminated promptly can continue to sting for considerably longer, especially in folds or areas where residue collects, such as around the nostrils and ears.

A phenomenon that catches many people off guard is re-activation. You think you have washed the capsaicin off, then you take a warm shower hours later and the burning flares up again. This happens because trace amounts of the oily residue remained in your pores or hair follicles. Warm water opens the pores and releases them. The solution is to wash the affected areas with a mild soap and cool water one more time before taking any warm showers, and to shampoo your hair thoroughly since pepper spray mist settles in hair easily.

Why Birds Can Eat Hot Peppers Without Flinching

This one is purely for curiosity, but it illuminates something about why capsaicin causes pain in the first place. Hot chili peppers evolved their pungency as a defense against mammals, which grind seeds with their molars and destroy them. Birds, which swallow seeds whole and pass them intact, were supposed to be spared so they could spread the seeds. And that is exactly what happened at the molecular level. Research has shown that the bird version of the TRPV1 receptor still responds to heat and acid, just as the mammalian version does, but it lacks the specific domain that makes it sensitive to capsaicin.¹¹ In other words, your burning eyes are a feature, not a bug, from the pepper plant’s perspective. Capsaicin’s ability to cause pain in mammals is an evolutionary adaptation for seed dispersal, and the receptor it targets is a relatively recent acquisition in mammalian biology. You are experiencing a 60-million-year-old plant defense strategy operating exactly as designed.

This also explains why capsaicin does not cause any actual tissue damage in most exposures. It hijacks a pain pathway without injuring the cells themselves, which is why the burning eventually stops entirely and most people recover without any lasting effects. The pain is real, but the “burn” is not.

Preparing in Advance

If you know you may be exposed to pepper spray, whether through work in law enforcement, security training, or attendance at events where crowd-control agents are used, a few preparations can help. Wear tight-fitting eye protection or sealed goggles if possible. Avoid wearing contact lenses, since they trap irritants against the cornea and can be damaged by the spray’s carrier solvents.³ Carry a large bottle of clean water and a small bottle of unscented dish soap. If you have access to liquid antacid, bring some premixed with water in a squeeze bottle, though keep in mind the evidence for its advantage over plain water is not settled.

Wear clothing that covers as much skin as possible, and choose layers that can be removed quickly if contaminated. Tightly woven fabrics block more spray than loose knits. If you wear a bandana or cloth over your lower face, know that it provides minimal respiratory protection against aerosolized capsaicin; only a properly fitted respirator with appropriate cartridges offers real airway protection.

After any exposure, bag your contaminated clothing separately and wash it in cold water with a heavy-duty detergent before mixing it with other laundry. Capsaicin residue can transfer to other garments in the wash if not handled properly, leading to an unpleasant surprise the next time you put on a shirt that shared the load.