Aspirin can help with sunburn. It reduces both the redness and the pain of sun-damaged skin, and the American Academy of Dermatology includes it among its recommended treatments. That said, it works best when taken early, it won’t speed up healing, and ibuprofen is generally the preferred over-the-counter option for most people.
How Aspirin Works on Sunburned Skin
Sunburn is an inflammatory response. When UV rays damage skin cells, your body floods the area with chemical signals that dilate blood vessels, recruit immune cells, and produce the familiar heat, swelling, and tenderness. Aspirin belongs to the NSAID (nonsteroidal anti-inflammatory drug) family, which means it blocks the production of several of these inflammatory signals. By dialing down that chemical cascade, it reduces redness and takes the edge off pain.
Interestingly, aspirin may also offer a layer of protection at the DNA level. Research published in the Journal of Investigative Dermatology found that aspirin reduced markers of UV-induced DNA damage in skin cells through a pathway unrelated to its usual anti-inflammatory mechanism. This doesn’t mean aspirin is a substitute for sunscreen, but it suggests the drug interacts with sun-damaged skin in more ways than simply dulling pain.
Timing Matters More Than You’d Think
A single oral dose of aspirin can delay the development of redness after sun exposure, but only if you take it early. In a double-blinded crossover study, participants who received aspirin starting 30 minutes before UV exposure showed significantly less redness four to six hours later compared to a placebo group. The takeaway: aspirin is most useful in the window right around and shortly after sun exposure, before inflammation fully ramps up.
Once a sunburn is well established (the deep, throbbing stage 12 to 24 hours later), aspirin still helps manage pain and swelling, but it won’t reverse the damage or shorten how long the burn lasts. No NSAID does. The redness, peeling, and sensitivity will follow their natural course regardless of what you take.
Aspirin vs. Ibuprofen for Sunburn
Both aspirin and ibuprofen target the same inflammatory pathway, and both are recommended for sunburn relief. In practice, ibuprofen is the more common first choice. It tends to be gentler on the stomach and carries fewer bleeding-related concerns for most adults. Naproxen is another option in the same drug class.
If you already have ibuprofen in the medicine cabinet, there’s no strong reason to switch to aspirin specifically for a sunburn. If aspirin is what you have on hand, it will do the job. Follow the dosing instructions on the label and don’t combine multiple NSAIDs at once, since they all irritate the stomach lining through similar mechanisms.
Stomach Risks Worth Knowing About
Aspirin is harder on the digestive tract than most people realize. A large systematic review in the British Journal of Clinical Pharmacology found that aspirin roughly doubles the risk of upper gastrointestinal complications like bleeding or ulcers, even at doses of 300 mg or less per day. The risk is highest during the first month of use. Buffered or coated formulations don’t appear to reduce this risk, and buffered aspirin may actually carry a slightly higher risk than plain tablets.
For a day or two of sunburn relief, the absolute risk remains low for most healthy adults. But if you have a history of stomach ulcers, acid reflux, or bleeding disorders, or if you take blood thinners, ibuprofen or acetaminophen (which helps with pain but not inflammation) may be a safer choice.
Never Give Aspirin to Children or Teens
This is the single most important safety point. Aspirin should not be given to anyone under 18. In children and teenagers, aspirin use has been linked to Reye’s syndrome, a rare but serious condition that causes swelling in the liver and brain. It carries a fatality rate of 20 to 30 percent, and survivors can sustain permanent brain damage. The Surgeon General issued a formal advisory against giving salicylates (the drug class aspirin belongs to) to young people, and the Mayo Clinic specifically repeats this warning in its sunburn guidance. For kids with sunburn, ibuprofen or acetaminophen are the appropriate options.
What Else to Do for a Sunburn
Aspirin addresses pain and swelling, but a sunburn needs more than that. Cool compresses or a cool (not cold) bath can bring immediate relief. Aloe vera gel or a fragrance-free moisturizer helps keep damaged skin hydrated, which reduces tightness and may limit peeling. Drink extra water, since sunburn draws fluid toward the skin’s surface and can leave you mildly dehydrated.
Avoid anything that traps heat against the skin: tight clothing, heavy creams, or products containing benzocaine or lidocaine, which can sometimes irritate burned skin further. If blisters form, leave them intact. They’re your body’s natural bandage, and popping them increases infection risk. A sunburn that covers a large area of the body, produces a fever, or causes severe blistering warrants medical attention rather than just over-the-counter management.