How do you start skin cycling as a beginner?

What skin cycling is, and what we couldn't confirm

Skin cycling is a social-media routine that rotates a retinoid, an exfoliant and rest nights over a repeating cycle. We could not find a dermatology source that defines it or lays out its exact calendar, so treat any specific schedule you see online as unverified.

That means the steps below come from general retinoid and exfoliant guidance, which is the active core of most versions of the routine. For a broader look at how the trend is usually described, read our skin cycling explainer.

Start the retinoid every third night

Bottom line: begin with a retinoid no more than every third night, then build toward nightly use only if your skin handles it. Harvard Health recommends this slower start, with a pea-sized amount spread over the whole face at bedtime. Harvard Health on starting a retinoid

A 1998 Journal of the American Academy of Dermatology review, which covered a prescription tretinoin protocol, was more cautious. It advised alternate nights or every third night for the first one to two weeks, especially for sensitive skin. Because it is dated, we treat it as a stricter floor rather than a current rule.

Start on the lowest strength you can find. A dermatology literature review notes that beginning at a lower concentration is the best way to prevent retinoid dermatitis with stronger products. Retinoid literature review on preventing dermatitis

Add exfoliation once or twice a week, not on retinoid nights

Bottom line: exfoliate one or two times a week, and keep it off the nights you use your retinoid. Harvard Health suggests that frequency and prefers chemical exfoliants over physical scrubs for aging skin. It also warns that too much product, or using it more often than indicated, can leave skin raw. Harvard Health on exfoliating aging skin

The 1998 review advises avoiding scrubs and exfoliants with tretinoin. Cleveland Clinic suggests either alternating glycolic acid and retinol on different days, or using glycolic acid in the morning and retinol at night. Cleveland Clinic on retinol and glycolic acid

Patch test, then pick your moisturizer order

Bottom line: patch test a small area for a couple of days before you use it all over, and if the retinoid feels drying, follow the moisturizer-first method the AAD describes. Cleveland Clinic advises the same patch test before adding retinol to a bedtime routine. Cleveland Clinic on retinol

The AAD says that if a retinoid is too drying, you can apply a non-clogging moisturizer right after washing, then apply the retinoid 20 to 30 minutes later. AAD guidance on skin care in your 20s The 1998 review says the opposite, that moisturizer should not be used with tretinoin at night. The sources disagree here, so unless your prescriber says otherwise, we'd follow the newer AAD approach.

Sun protection and when to back off

Bottom line: retinoids can make skin more sensitive to sun, so use them at night and wear sunscreen every morning. The AAD's guidance on retinoids and retinol makes the same point. AAD on retinoid sun sensitivity

Back off if you notice mild irritation, redness or dryness. The 1998 review says to reduce the amount applied until your skin adjusts to nightly use. If irritation doesn't settle, that's a reason to see a dermatologist rather than push through it.