Stop using it. Today, not at the end of the bottle. Then let the skin finish the whole process — the redness, the heat, the peeling — before anything active touches it again.
That is the entire instruction, and the interesting part is what sits behind it. We fetched and read the AAD’s own sunburn page for this guide, and it is a detailed set of instructions that mentions no retinol, no retinoid, and no active skincare of any kind. That absence is the honest answer to “when can I restart?”: the dermatologists’ own association sets no interval, because at the point where you are treating a burn, a serum is not part of the conversation.
What the AAD actually tells you to do
Quoted rather than paraphrased, because every one of these is more useful than anything a retinol could do this week:
- “The first thing you should do is get out of the sun—and preferably indoors.”
- “Take frequent cool baths or showers to help relieve the pain”, then “as soon as you get out of the bathtub or shower, gently pat yourself dry”.
- “Apply a moisturizer that contains aloe vera or soy to help soothe sunburned skin” — and do it “while your skin is still damp from a bath or shower and whenever you feel discomfort”.
- Calamine lotion, a cool damp washcloth or a colloidal oatmeal bath for discomfort; aspirin or ibuprofen “to help reduce any swelling and discomfort”.
- Extra water, because “a sunburn draws fluid to the skin’s surface and away from the rest of the body”.
- If it blisters: “Blistering skin means you have a second-degree sunburn. You should not pop the blisters, as blisters form to help your skin heal and protect you from infection. Keep blisters clean and apply petroleum jelly to protect them while they heal.”
The pharmacology underneath the moisturizer instruction is worth a line, because it explains why “apply it while damp” is not folklore: moisturizers work by limiting water loss (occlusives), holding water in the surface layer (humectants) and filling the gaps between cells (emollients). Applying one to damp skin gives the humectants water to hold.
Why a retinoid is the wrong thing to be holding
A burn is an inflammatory injury to the surface layer. A retinoid’s whole job is to change how that layer behaves — the double-blind histology on prescription tretinoin found epidermal thickening and compaction of the stratum corneum — and doing that to skin which is already shedding in sheets will not accelerate anything useful. It will sting, it will prolong the redness, and it risks turning an injury that resolves in a week into a reaction that lasts a month.
There is also nothing to lose. On a ten-month improvement curve, a ten-day pause is a rounding error. The only thing a pause genuinely costs you is tolerance.
How to tell it is safe to restart
Four conditions, all of them things you can check rather than count:
- No pink. Colour back to your own baseline, not merely improving.
- Peeling finished. Not peeling less — finished.
- No tenderness to touch, no heat, no tightness.
- Moisturizer no longer stings when it goes on. If a plain moisturizer stings, an active will do far worse.
Then restart as a beginner would: two nights a week for a fortnight, a pea for the whole face, moisturizer over the top, nothing else new at the same time. If the burn was severe or you were off for a month or more, restart at a lower stated strength as well — the published escalating-dose method is the model, and it works in this direction too.