Aspirin mask for acne: does crushed aspirin help?

No study has tested an aspirin mask, crushed aspirin or aspirin paste on acne. Aspirin is a tablet for pain and fever. Salicylic acid, the acne ingredient that the FDA allows in store-bought products, is a different medicine. This page is part of Skinli's guide to home remedies for acne.

Skinli gives general education and is not a doctor. For the studies below, Skinli read the published summaries (abstracts). No source read for this guide gives a recipe for an aspirin mask, so this page gives none.

What an aspirin tablet is, according to its label

The Drug Facts label of a 325 mg aspirin tablet on DailyMed, the label database of the US National Library of Medicine, starts with these lines:

• Active ingredient: "Aspirin 325 mg (NSAID)". NSAID stands for non-steroidal anti-inflammatory drug, a family of medicines for pain and swelling.
• Purpose: "Pain reliever/fever reducer"
• Uses: headache, muscle pain, toothache, menstrual pain, the pain and fever of colds, and minor pain of arthritis.
• Directions: "drink a full glass of water with each dose"

Every direction on the label is for swallowing a tablet. It has no line about crushing a tablet, mixing it with water or putting it on skin, and acne is not among its uses. MedlinePlus, from the US National Library of Medicine, lists the forms aspirin is sold in: "Aspirin comes as a regular tablet, an extended-release (long-acting) tablet, and a chewable tablet to take by mouth."

So the question of which aspirin to use on the face has a short answer: no aspirin product is labelled for skin.

A tablet also holds more than aspirin. The label lists corn starch, hypromellose, powdered cellulose and triacetin as inactive ingredients, and says the tablet may contain carnauba wax. A mask made from crushed tablets puts all of them on the face.

Aspirin and salicylic acid are two medicines

	Aspirin	Salicylic acid
Group, by MedlinePlus	"Aspirin is in a group of medications called salicylates."	"Salicylic acid is in a class of medications called keratolytic agents."
How it is used	Swallowed as a tablet	Put on the skin
What it is for	Pain, fever and swelling	"Topical salicylic acid is used to help clear and prevent pimples and skin blemishes in people who have acne."
On the FDA list of acne drugs sold without a prescription	No	Yes: "(d) Salicylic acid, 0.5 to 2 percent."

Topical means put on the skin. MedlinePlus explains what a keratolytic agent does on other skin problems: it works "by softening and loosening dry, scaly, or thickened skin so that it falls off or can be removed easily."

The two chemicals are related. A 1985 review of this drug family says: "Aspirin (acetylsalicylic acid) is still the most commonly used salicylate." It also says that after a tablet is swallowed, enzymes in the liver and the stomach change aspirin into salicylic acid. That change happens inside the body. No source read for this guide says it happens in a paste on the face.

MedlinePlus treats the two as separate drugs. Its page on salicylic acid for the skin lists aspirin among the products that may interact with it. Skinli's guide on what salicylic acid is explains the acne ingredient in full.

What happened when aspirin was put on skin

Three small studies put aspirin on skin. All three treated nerve pain during or after shingles, a painful rash caused by a virus.

• 1998, 19 people. Aspirin was dissolved in diethyl ether, a liquid used to dissolve other substances, and dabbed on the painful skin. The researchers then measured aspirin and salicylic acid in the outer skin layer. Aspirin there was 80 to 100 times the level seen after a tablet, by the study's figures. Salicylic acid in the skin did not rise in the same way. The authors wrote: "The mechanism is exclusively local; there are no active drugs in plasma after topical administration." Plasma is the liquid part of blood.
• 2001, 30 people. Aspirin was mixed into a moisturizing lotion and compared with aspirin tablets. The summary says: "Treatment tolerance was excellent in both groups."
• 1996, 37 people. The same ether mixture was compared with two other pain medicines and a placebo, which is a treatment with no drug in it. Only the aspirin mixture did better than the placebo.

The three studies found that aspirin in such a liquid or in a lotion can enter the outer layer of skin and ease nerve pain. Their limits for acne are plain. No study looked at pimples, pores or oil. None used tablets crushed in water. In the 1998 study the aspirin stayed as aspirin, and the level of salicylic acid in the skin did not go up.

One animal study exists too. In 2022, researchers reported that "topical administration of low-dose aspirin (36 μg/wound/day) improves cutaneous wound healing", which means the healing of skin wounds, in diabetic mice. That dose is 36 millionths of a gram a day. One 325 mg tablet holds more than 9,000 times that amount, and the study was done on wounds in mice, with no acne involved.

The label warnings that apply to aspirin

The tablet label carries these warnings.

• Allergy. "Aspirin may cause a severe allergic reaction which may include:" hives, facial swelling, asthma (wheezing) and shock. The label also says: "Do not use if you are allergic to aspirin or any other pain reliever/fever reducer". The NHS lists the same group of people, those who have had "an allergic reaction or serious side effect from aspirin, ibuprofen or another non-steroidal anti-inflammatory drug (NSAID)".
• Asthma. The label says to ask a doctor before use if "you have asthma". MedlinePlus says that for people with asthma, a frequent stuffed or runny nose, or growths in the nose called nasal polyps, "there is a risk that you will have an allergic reaction to aspirin."
• Children and teenagers. "Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product." The reason is Reye's syndrome, a rare and serious illness. The NHS goes further: "Do not give aspirin to children aged 15 years or under because it can cause a serious condition called Reye's syndrome in rare cases."
• Pregnancy. "It is especially important not to use aspirin during the last 3 months of pregnancy unless definitely directed to do so by a doctor".

All of these warnings were written for aspirin that is swallowed. The FDA rule that sets the Reye's syndrome warning covers salicylate products taken by mouth or given rectally, and it says nothing about aspirin put on skin. No source read for this guide measures how much aspirin from a paste of crushed tablets reaches the blood. MedlinePlus carries a similar caution for the tested skin product: "children and teenagers who have chicken pox or the flu should not use topical salicylic acid unless they have been told to do so by a doctor".

What the AAD says about face masks

The American Academy of Dermatology (AAD) has a page on face masks. It says: "dermatologists say facial masks can't replace treatment for diseases and conditions such as eczema or acne."

The same page warns about masks with unsuitable ingredients: "Using masks with the wrong ingredients for you can lead to irritation, dryness, or even breakouts because they can damage your skin barrier". The skin barrier is the outer layer of skin that holds water in and keeps irritants out. The AAD's advice for any mask is to test it first and to wash it off if the skin reacts:

• "Test a new facial mask on small areas of skin first to help prevent reactions."
• "Immediately wash off a facial mask if you feel itching, burning, or stinging. This could be a sign of skin irritation or an allergy."

The AAD links irritation and acne directly: "Anytime you irritate your skin, you risk getting more acne." Other pages in this guide cover kitchen masks, such as honey for acne and turmeric for acne.

What the AAD, the NHS and the FDA rule support

The tested member of this drug family is salicylic acid in a finished acne product. The sources describe it this way:

• What it does. The AAD says: "Used for years to treat acne, salicylic acid opens clogged pores and exfoliates the skin." MedlinePlus says it works "by reducing swelling and redness and unplugging blocked skin pores to allow pimples to shrink."
• Where it works best. The AAD says: "Because it unclogs pores and exfoliates the skin, salicylic acid works best on whiteheads and blackheads."
• The strength the FDA allows. 0.5 to 2 percent in acne drugs sold without a prescription. The same rule lists benzoyl peroxide, sulfur, and sulfur combined with resorcinol.
• How strong the recommendation is. The AAD's 2024 acne guideline gives salicylic acid a conditional recommendation, and gives benzoyl peroxide a strong one.
• How long it takes. MedlinePlus says "it may take several weeks or longer for you to feel the full benefit of the medication."
• Where it should stay off. MedlinePlus says: "Do not apply topical salicylic acid to skin that is broken, red, swollen, irritated, or infected."
• Safety record. A 2003 review of acne drugs put on the skin says salicylic acid poisoning has happened with muscle rub ointments and with high strengths on large areas of thickened skin, and that "there are no known cases resulting from salicylic acid acne products."

The NHS acne page says to "try acne treatments you put on your skin such as salicylic acid or benzoyl peroxide". For a deep, painful pimple, the AAD says: "Choose a product that contains one of these acne-fighting active ingredients: adapalene, azelaic acid, benzoyl peroxide, or salicylic acid." It adds: "Apply a thin layer, as using too much can irritate your skin even more." The AAD's acne pages name a maker of prescription acne drugs as their supporter.

Skinli's guide to salicylic acid vs benzoyl peroxide compares the two ingredients that the NHS names.

When to see a doctor

Get medical help right away for hives, swelling of the face or wheezing after aspirin in any form. The tablet label says: "an allergic reaction occurs. Seek medical help right away." Wash off any mask that itches, burns or stings, as the AAD advises.

For the acne itself, the NHS says to see a GP, which is a family doctor, if "you have lots of spots, or the spots are deep, painful or causing scars". The AAD says people with large, painful pimples deep in the skin, or acne that leaves a scar when it clears, need to see a dermatologist for treatment. If you are pregnant or trying to become pregnant, the AAD says to consult a dermatologist before treating acne on your own.