How to Stop Mace From Burning Your Skin

Removing contaminated clothing, moving to fresh air, and flushing exposed skin with large volumes of water are the most important first steps after a mace or pepper spray exposure. Beyond that, the honest and somewhat frustrating answer is that no topical remedy has been shown to significantly speed up the resolution of burning. A randomized controlled trial comparing several common treatments found that time was the dominant factor in pain relief, not the specific remedy applied. That said, there are things that genuinely help, things that are a waste of precious minutes, and situations that demand professional medical attention.

What Mace Actually Does to Your Skin

Most products sold as “mace” today contain oleoresin capsaicin, the same family of compounds that makes hot peppers hot. When this oily resin lands on your skin, capsaicin molecules bind to a receptor called TRPV1 on pain-sensing nerve endings. TRPV1 normally responds to heat, which is why the sensation feels almost identical to a burn even though no actual thermal damage is occurring. The nerve fibers fire intensely, triggering local inflammation, redness, and a stinging that can last anywhere from 30 minutes to over two hours depending on concentration and how quickly you decontaminate.

Capsaicin is fat-soluble rather than water-soluble, which is why it clings to skin and resists a quick rinse. The carrier liquid in the spray also matters. Research on how different vehicles affect capsaicinoid absorption found that preparations using isopropyl alcohol delivered roughly three times more capsaicin into the outer layer of skin compared to those using propylene glycol or mineral oil, and that peak skin concentrations were reached quickly regardless of vehicle type.1ScienceDirect. Effects of vehicle on the uptake and elimination kinetics of capsaicinoids in human skin in vivo This means the intensity and duration of your burning can vary significantly based on the specific product used, not just the capsaicinoid concentration listed on the canister.

Immediate Steps After Exposure

Speed matters more than picking the perfect treatment. Every second the oily residue sits on your skin, more capsaicin is absorbing into the outer layers. Here is what to do, roughly in order:

  • Get to fresh air: If you were sprayed indoors or in a confined space, move outside or to a well-ventilated area. Inhaling aerosolized capsaicin compounds the problem by adding respiratory irritation on top of the skin burn.
  • Remove contaminated clothing: Anything the spray touched will keep re-exposing skin it contacts. Bag the clothing separately and avoid touching your face with contaminated hands.
  • Flush with water: Run cool water over the affected skin for at least 15 minutes. The water itself is not dissolving the capsaicin efficiently, but the mechanical flushing action physically removes residue that has not yet been absorbed. Tilt your head so that water runs away from your eyes and mouth, not toward them.
  • Wash with soap: After the initial flush, use a mild dish soap or non-oil-based liquid soap and gently wash the area. Soap helps emulsify the oily capsaicin resin so water can carry it away. Avoid scrubbing hard, which can drive the compound deeper into your skin or spread it to clean areas.
  • Avoid touching other body parts: Capsaicin transfers easily. People often make things worse by touching their eyes or genitals after handling contaminated skin or clothing.

One counterintuitive thing worth knowing: cool water feels soothing in the moment, but the relief is temporary. Research on chile pepper burns found that cool water provided better initial pain relief compared to vegetable oil, while oil provided better long-term relief.2PubMed Central / Taylor & Francis Online. Household treatment for “chile burns” of the hands For a pepper spray exposure, though, you want the initial flush primarily to remove residue from the skin surface, and cool water does that job well enough.

Why Most Treatments Perform About the Same

If you search online for remedies, you will find passionate advocacy for milk, baby shampoo, antacid suspensions, lidocaine gel, and various proprietary decontamination sprays. A randomized controlled trial tested several of these head-to-head. Volunteers were exposed to pepper spray, then treated with either baby shampoo, lidocaine gel, aluminum hydroxide and magnesium hydroxide antacid, or plain water. The result was clear and a bit deflating: pain decreased significantly over time in all groups, but no treatment performed better than any other.3PubMed. A randomized controlled trial comparing treatment regimens for acute pain for topical oleoresin capsaicin (pepper spray) exposure in adult volunteers

That finding is important because it tells you something fundamental about how capsaicin burning works. Once the compound has bound to TRPV1 receptors and triggered the pain cascade, there is no topical agent that can pull it off those receptors from outside the skin. The burning resolves when the nerve endings essentially exhaust themselves. Time is doing the heavy lifting. Any soothing sensation you get from cold water or milk is temporary sensory relief rather than chemical decontamination.

This does not mean you should skip the water flush. Removing unabsorbed residue from the skin surface prevents more capsaicin from penetrating and shortens the overall duration of exposure. But once you have washed thoroughly, switching from water to milk to baby shampoo to antacid is not gaining you much.

The Antacid Exception

One treatment does show some promise in a specific context. A poison center study looked at people who called in after capsaicin exposures and were instructed to apply a liquid antacid topically. About 70% of callers reported meaningful pain reduction within 30 minutes, particularly when the antacid was applied early after exposure to refined capsaicin products rather than raw peppers.4The American Journal of Emergency Medicine. Topical antacid therapy for capsaicin-induced dermal pain: a poison center telephone-directed study The study design was less rigorous than the randomized trial described above, since it relied on self-reported outcomes from telephone follow-ups rather than controlled conditions. Still, it suggests that if you happen to have a bottle of liquid antacid on hand and your skin is still burning after washing, dabbing some on may be worth trying. It is inexpensive, unlikely to cause harm, and the alkaline suspension may help neutralize some of the acidic components in the spray formulation.

The key qualifier is “early.” If you are 45 minutes into the burn and have already washed thoroughly, an antacid application is less likely to make a noticeable difference. The window where any topical treatment has its best shot at helping is within the first few minutes after exposure, before maximum absorption has occurred.

Things That Do Not Help or Make It Worse

A few common recommendations deserve specific debunking because they can waste time or actively cause harm:

  • Rubbing alcohol: Since capsaicin is fat-soluble, people reason that a solvent like rubbing alcohol should dissolve it. In theory this is true, but alcohol on irritated, inflamed skin causes its own sharp sting, and the research on vehicle absorption suggests that alcohol-based carriers actually increase how much capsaicin penetrates into the skin.1ScienceDirect. Effects of vehicle on the uptake and elimination kinetics of capsaicinoids in human skin in vivo You could end up driving more capsaicin deeper rather than removing it.
  • Petroleum jelly or heavy creams: Applying an occlusive barrier traps whatever capsaicin is on the skin underneath a layer of grease. This can prolong the burning rather than relieve it. You want the residue off the skin, not sealed against it.
  • Hot water: Some sources recommend hot water on the theory that it opens pores and releases capsaicin. In practice, TRPV1 receptors are heat-activated. Hot water on skin that is already in TRPV1 overdrive will intensify the pain dramatically. Stick with cool to lukewarm water.
  • Excessive scrubbing: Abrasive scrubbing with brushes or rough cloths damages the skin barrier, potentially allowing more capsaicin to penetrate and setting the stage for secondary irritation or infection.

Milk comes up in nearly every online list of remedies. The fat and casein in whole milk can help dissolve and wash away capsaicin on the skin surface, and many people report subjective relief. But the controlled trial data shows milk-based approaches do not outperform plain water in terms of measured pain reduction over time. If milk is what you have, it will not hurt. Just do not delay a simple water flush while searching for a carton.

Specialized Decontamination Products

Emergency services and military personnel sometimes use amphoteric decontamination solutions designed specifically for chemical exposures. One such product, Diphoterine, was tested in a small study on French law enforcement officers exposed to CS tear gas. After decontamination with Diphoterine, four of the five participants had rapid resolution of both eye and skin symptoms and were able to return to operational readiness. When the solution was applied before exposure, the expected effects did not occur at all.5PubMed. Prevention of CS tear gas eye and skin effects and active decontamination with Diphoterine: preliminary studies in 5 French Gendarmes

These results are encouraging but come from a very small study with only five participants, and the chemical tested was CS gas rather than OC pepper spray. CS and OC work through different mechanisms: CS is an alkylating agent that irritates mucous membranes and skin broadly, while OC specifically targets TRPV1 receptors. A product that works well against one may not work identically against the other. Diphoterine and similar specialized solutions are also not widely available to the general public, though some first-aid supply vendors carry them. For most people in most situations, soap and water remain the practical default.

When You Need Medical Attention

The vast majority of pepper spray exposures resolve on their own without lasting harm. A review of over 3,600 pepper spray cases reported to a poison control system found that about 93% involved only minor symptoms. Roughly 7% had symptoms severe enough to warrant medical evaluation, most commonly affecting the eyes, respiratory system, and skin. No deaths were reported in the entire dataset.6PubMed. Pepper spray injury severity: ten-year case experience of a poison control system

You should seek medical care if any of the following occur:

  • Breathing difficulty: Wheezing, persistent coughing, or a feeling of tightness in the chest after inhalation exposure. People with asthma are at higher risk for serious bronchospasm.
  • Blistering or chemical burns: If the skin develops blisters, open sores, or discoloration beyond redness, the exposure may have caused actual tissue damage rather than simple irritation.
  • Prolonged symptoms: Skin burning that persists well beyond two hours after thorough decontamination, or that worsens rather than gradually improving.
  • Eye involvement: Severe eye pain, blurred vision, or inability to open the eyes after flushing with water for 15 minutes. The eyes are the organ system most commonly involved in serious pepper spray cases.
  • Signs of allergic reaction: Swelling of the face, lips, or throat, hives spreading beyond the area of direct exposure, or dizziness.

Contact lens wearers who are sprayed should remove lenses as soon as possible, as the lenses can trap capsaicin against the cornea. Flush the eyes with clean water for at least 15 to 20 minutes after removal. In a medical setting, clinicians will typically irrigate with saline and may use topical anesthetics for eye pain, but over-the-counter eye drops are not strong enough to address a full OC exposure.

Why Your Skin Reacts Differently Than Someone Else’s

People exposed to the same spray at the same distance sometimes have strikingly different reactions. Part of this comes down to the spray itself: the capsaicinoid concentration, the carrier solution, and the specific blend of compounds vary between products. Research comparing pepper spray products on skin of different ethnic backgrounds found that products with capsaicinoid concentrations above a certain threshold produced greater redness in lighter skin compared to darker skin, and that synthetic capsaicin analogs triggered different responses than natural capsaicinoid blends depending on skin type.7PubMed Central. Assessment of pepper spray product potency in Asian and Caucasian forearm skin using transepidermal water loss, skin temperature and reflectance colorimetry

Beyond ethnicity, individual variation in skin thickness, oil production, and density of TRPV1 receptors all play roles. People who regularly eat extremely hot food or who have used capsaicin-containing pain creams may have some degree of desensitization in the areas they have treated. Research on repeated topical capsaicin application showed that after just three days of use, the number of pain-sensing nerve fibers in the outer skin dropped by about 74%, with an 82% reduction after three weeks.8Pain. Topical capsaicin in humans: parallel loss of epidermal nerve fibers and pain sensation This nerve fiber retraction is reversible; once capsaicin application stops, the epidermis re-innervates over about six weeks and normal sensation returns. But it does mean that someone who has recently used a capsaicin pain patch on their arm will genuinely feel less burning from a spray exposure on that same area.

This desensitization process is actually the basis of medical capsaicin treatments. A high-concentration capsaicin patch used for neuropathic pain works not by depleting pain-signaling chemicals, as was once assumed, but by temporarily “defunctionalizing” the nerve endings themselves: the fibers lose their membrane potential, retract from the skin surface, and stop transmitting pain signals for weeks after a single application.9BJA: British Journal of Anaesthesia. Topical capsaicin for pain management: therapeutic potential and mechanisms of action of the new high-concentration capsaicin 8% patch It is the same biology, just repurposed from a weapon to a treatment.

CS Gas Versus OC Spray

People often use “mace,” “pepper spray,” and “tear gas” interchangeably, but they are not the same thing. Most commercial self-defense sprays use OC (oleoresin capsaicin), derived from hot peppers. Law enforcement and military tear gas more commonly uses CS (2-chlorobenzalmalononitrile), a synthetic chemical that irritates through a different pathway. Some formulations combine both.

The decontamination approach is similar for both: remove clothing, flush with water, and get to fresh air. But CS tends to be more of a mucous membrane irritant and less of a skin-binding agent compared to OC. Water is generally more effective at removing CS residue from skin because CS is a particulate that sits on the surface rather than an oil that absorbs into it. OC’s oily base makes it stickier and harder to wash off, which is partly why pepper spray burns tend to linger longer on skin than CS exposure does.

If you have been exposed to CS gas specifically, avoid rubbing the affected areas. CS particles can be ground further into the skin by rubbing, and the chemical can reactivate when it contacts moisture. People sometimes experience a second wave of burning when they shower after a CS exposure, as water reactivates residual particles. A short, cool shower with the water running off rather than pooling on the skin minimizes this effect. With OC spray, this reactivation phenomenon is less pronounced, though traces of capsaicin in hair can trickle down and cause burning during a later shower if the hair was not washed thoroughly during initial decontamination.

For anyone who anticipates possible exposure to either agent, keeping a change of clothes in a sealed bag, a bottle of unscented dish soap, and a large volume of bottled water accessible is more useful than any specialized remedy. The evidence consistently points toward fast, thorough physical removal of the chemical as the single most effective intervention, with everything else running a distant second to simply letting the clock run out.