Fresh air and large amounts of water are the two most effective immediate treatments for pepper spray exposure. Most symptoms resolve on their own within 10 to 30 minutes once you’re away from the source and begin rinsing, though some effects like headache or skin redness can linger longer. Here’s what actually works, what doesn’t, and what to expect during recovery.
Why Pepper Spray Burns So Intensely
Pepper spray contains capsaicin, the same compound that makes hot peppers hot, but in a concentrated form. When it hits your skin, eyes, or airways, it triggers a process called neurogenic inflammation. Capsaicin powerfully stimulates heat receptors in your nerve endings, which is why the burning feels thermal even though there’s no actual heat source. Your body responds with pain, tearing, involuntary eye closure, coughing, and difficulty breathing. In your airways, it stimulates cough reflexes and can cause the bronchial tubes to tighten.
Understanding this mechanism matters because it explains a key fact: the burning is a nerve response, not chemical damage in most cases. That’s why symptoms fade relatively quickly once the irritant is removed from your skin and mucous membranes.
Step One: Get to Fresh Air
Move away from the area where the spray was deployed. This is the single most important step for respiratory symptoms. Coughing, choking, and chest tightness typically begin resolving within 10 to 20 minutes once you’re breathing clean air. If you’re indoors, get outside. If you’re in a crowd where spray is still in the air, move upwind or to higher ground since the particles settle downward.
Resist the urge to rub your eyes or touch your face. Your hands are almost certainly contaminated, and rubbing will grind the oily residue deeper into your skin and eyes, making everything worse.
How to Flush Your Eyes
The American Academy of Ophthalmology recommends irrigating your eyes with water or saline for 15 to 20 minutes. That’s longer than most people think, and it matters. The goal is to reduce contact time and physically wash away remaining particles. Tilt your head so the water runs from the inner corner of your eye outward, preventing contaminated water from flowing into the other eye.
If you wear contact lenses, remove them before flushing and throw them away. Contacts can trap capsaicin against the surface of your eye and make decontamination harder. After the initial 15 to 20 minutes of flushing, visual acuity typically returns to normal, though redness along the eyelid margins and sensitivity to light can persist longer.
Decontaminating Your Skin
Wash affected skin with large amounts of cool or lukewarm water and a mild soap. Unlike older chemical irritants, pepper spray doesn’t persist on clothing or skin the way tear gas agents can, which is good news for cleanup. Skin redness typically resolves within an hour. In more severe cases where blistering occurs, those lesions usually heal within four days.
One important caution: if it’s cold outside, be careful with cold water rinses. Capsaicin stimulates heat receptors, which triggers your body’s cooling mechanisms, including sweating and blood vessel dilation. Combining that response with cold water decontamination on a cold day can increase the risk of hypothermia. Use lukewarm water when possible in cold weather.
Handling Contaminated Clothing
Remove your clothing as soon as you can, but don’t pull shirts over your face if avoidable (cut them off or pull from the back). Don’t handle contaminated clothing with bare hands. Use rubber gloves, tongs, or even sticks to place the clothing into a sealed plastic bag. Anyone helping with decontamination should avoid direct skin contact with the residue, or they’ll start experiencing symptoms too.
Shower thoroughly before putting on fresh clothes. Pay attention to your hairline, behind your ears, and anywhere the spray may have settled without you noticing. Capsaicin residue reactivates when it gets wet, so your first shower may bring a brief return of burning. This is normal and fades quickly.
Does Milk Actually Help?
You’ve probably seen people pouring milk over their faces at protests. The idea comes from the fact that casein, a protein in milk, can bind to capsaicin and help lift it off surfaces. This works reasonably well for capsaicin in food. But for eyes specifically, there is no clinical evidence supporting the use of milk or baby shampoo solutions over plain water or saline. The American Academy of Ophthalmology has noted that despite the popularity of baby shampoo recommendations online, no available evidence supports the practice for eye irrigation.
Water and saline remain the recommended choices. They’re sterile (or at least clean), widely available, and proven effective. Milk introduces bacteria and other compounds near mucous membranes that are already irritated and vulnerable. If water is all you have, water is all you need.
What the Recovery Timeline Looks Like
Most people are surprised by how quickly symptoms improve once decontamination begins. Here’s what to expect:
- Eye pain and blurred vision: 10 to 30 minutes after flushing begins. Eyelid redness and light sensitivity may last longer.
- Breathing difficulty and coughing: 10 to 20 minutes after reaching fresh air.
- Skin redness: resolves within about an hour in most cases.
- Runny nose and excess saliva: can persist for up to 12 hours.
- Headache: can linger for up to 24 hours.
- Blistering (if it occurs): typically heals within four days.
In the vast majority of cases, the worst is over within 20 to 30 minutes. The lingering effects like headache and runny nose are uncomfortable but not dangerous.
When Symptoms Need Medical Attention
Pepper spray effects are self-limiting for most healthy people, but certain situations require professional help. Persistent difficulty breathing, wheezing that doesn’t improve in fresh air, or a feeling that your throat is closing can indicate bronchospasm or swelling in the airway, both of which need treatment. People with asthma or other respiratory conditions are at higher risk for serious breathing complications.
Eye symptoms that don’t improve after thorough irrigation, or that worsen in the hours afterward, could indicate a corneal abrasion. Severe skin blistering beyond mild redness also warrants evaluation. If you’re unsure about the severity of an exposure, Poison Control can be reached at 1-800-222-1222.
Protecting Others During Decontamination
Secondary exposure is a real concern. If you’re helping someone who’s been sprayed, avoid touching their face, hair, or clothing with bare hands. Wear gloves if you have them. If capsaicin residue gets on your hands and you touch your own face afterward, you’ll experience the same burning. Pets that have been sprayed should also be handled carefully, as the residue transfers easily through direct contact. Wash your hands thoroughly with soap and water after any contact with a contaminated person, animal, or surface.