How to start retinol for acne without irritation

Retinol is a popular first retinoid, and starting it badly is the usual reason people quit. The advice on starting a retinoid comes from the American Academy of Dermatology (AAD), the American Academy of Pediatrics (AAP), NICE and drug labels. None of those sources is a study of retinol for acne, and the evidence that retinol works for acne is limited, as Skinli's guide to whether retinol works for acne explains. What follows is the slow-start method these sources give for retinoids, which people apply to retinol products too. It is part of Skinli's guide to retinoids for acne.

Who should ask first

The AAD says people who have skin allergies or dryness are probably not good candidates for a product that contains a retinoid, and that retinoids should not be used during pregnancy. An AAD news release from October 2025 quotes Dr. Garshick recommending that tweens and teens avoid products with active ingredients like retinol, and adds that a dermatologist may recommend a retinoid in some cases. Skinli's guides on retinoids during pregnancy and breastfeeding and retinoids for teens give the details. If any of these applies to you, ask a doctor before starting.

Why a slow start

NICE explains its advice in the rationale for its acne guideline. It says the evidence indicated that topical agents such as benzoyl peroxide and retinoids often cause skin irritation, so the committee recommended an initial alternate-day or short-contact application to help reduce skin irritation and, in doing so, to encourage adherence to treatment. In other words, the slow start exists so that people keep using the treatment long enough to judge it.

Step 1: Test the product

The AAD recommends testing a new skin care product before adding it to your routine. Its steps: "Apply the product to a test spot twice daily for seven to 10 days." Choose a quarter-sized spot where the product will not be rubbed or washed away, such as the underside of your arm or the bend of your elbow. Use the normal amount and thickness you would use if you were applying the product regularly. If after seven to 10 days you have no skin reaction, such as red, itchy or swollen skin, the AAD says to go ahead and use the product.

The AAD adds that some ingredients, such as retinol and glycolic acid, can irritate your skin, particularly if your skin is sensitive, and calls that reaction "normal and temporary."

Step 2: Pick one product and the lowest strength

The AAD advises using "the least-intense retinoid formula" you can find. With retinol this is harder than it sounds, because the AAD points out that for over-the-counter retinol products there is no standard requirement that the percentage of retinol be disclosed on the label. The AAP says to start acne products one by one and little by little to avoid irritating your skin, so add nothing else new while you begin.

NICE gives a second way to ease in. For topical treatments such as benzoyl peroxide or retinoids, it says to start with alternate-day or short-contact application, for example washing off after an hour, and to progress to a standard application if it is tolerated.

Step 3: Apply at night, every other night

The AAD says to use a retinoid every other night to start, slowly building up. The AAD's source dermatologist advises using it only at night, because retinoids can make skin more sensitive to sun. The AAP says to use it every other day or just a couple of times a week to limit dryness, then increase how often you use it little by little. An NHS hospital leaflet on adapalene suggests two to three times per week at first and then every night as tolerated. The 2024 AAD guideline says irritation may be reduced by less frequent use and by using an emollient, which is a moisturizer, at the same time.

Step 4: Use a small amount over the whole area

The AAP describes a "pea-sized" amount of retinoid applied in five dots on different parts of the face, then rubbed over the entire face, including skin without visible pimples. The AAP says this prevents new pimples from developing. Prescription labels use the same pea-sized measure: the Epiduo Forte label says to use a pea-sized amount for each area of the face. Retinol products print their own directions, so follow the label of the product you buy. The AAD says not to increase the amount you apply.

Step 5: Wait after washing, and moisturize

The AAD says to apply a retinoid before bed, and that after washing your face you should wait 20 to 30 minutes and then apply it. If you find the retinoid too drying, the AAD says to apply a moisturizer immediately after washing your face, using one that will not clog your pores, and then apply the retinoid 20 to 30 minutes later. An NHS hospital leaflet on adapalene gives the opposite order: wait until the adapalene has been absorbed before applying moisturizers. The AAD says using a moisturizer every day can help your skin tolerate adapalene, tazarotene or tretinoin, and the Retin-A leaflet explains why waiting matters: it is important for skin to be completely dry to minimize possible irritation.

Step 6: Protect your skin from the sun

Retinoids can make skin more sensitive to sun. The AAD advises using sun protection during the day, and its acne page recommends non-comedogenic sunscreen with broad-spectrum protection, SPF 30 or higher, and water resistance on all skin not covered by clothing. The Differin label tells users to limit sun exposure, including light from tanning beds, and to use sunscreen when going outdoors.

What to avoid while you start

Do not exfoliate on top of a retinoid. The AAD says that some medications and even over-the-counter products may cause your skin to be more sensitive or peel, such as prescription retinoid creams or products containing retinol or benzoyl peroxide, and that exfoliating while using them may worsen dry skin or even cause acne breakouts. The AAD also advises avoiding a retinoid for the first time under a face mask. The AAD's darker skin advice adds that irritation can trigger dark marks known as hyperpigmentation, and that starting slowly and using moisturizer helps reduce that risk.

If your skin gets irritated

The AAD says irritation from a retinoid is not usually an allergy. Its acne page lists ways to ease it: apply a smaller amount, use the retinoid less often, or apply moisturizer first, and it says to make those changes only with your dermatologist's help. An NHS hospital leaflet says that if your skin gets badly irritated, you can try applying it less frequently or stop using it temporarily, and that if the irritation is more severe or does not get better, you should stop and consult your doctor. See Skinli's guide to retinoid dryness and peeling.

Common mistakes

The sources above point to five mistakes. Starting a retinoid for the first time under a face mask, which the AAD advises against. Increasing the amount, which the AAD advises against and which an NHS hospital leaflet says will not make the medicine work any quicker. Exfoliating on top of a retinoid, which the AAD says may worsen dry skin or cause breakouts. Starting several acne products in the same week, which the AAP advises against. Skipping sunscreen in the daytime, which the AAD and the Differin label both advise against.

Keep a record

Acne changes slowly, so a record helps you judge whether a product is working. Skinli's guide to tracking acne progress with photos explains how to take photos that can be compared from week to week. Bring the photos and the list of products you use when you see a doctor.

How long before you judge it

For acne treatments in general, NICE says positive effects can take 6 to 8 weeks to become noticeable, and the AAP says acne takes at least two months to get better after you start treatment. The Differin Gel label says it may take up to 3 months of once daily use to see results. No source read for this guide gives a timeline for retinol on its own.

When to see a doctor

See a doctor if acne is painful, cystic, getting worse, or has not improved after a few months of steady care. Skinli's guide to what to mix with a retinoid covers which products to keep apart while you build up.