# How to Use Tretinoin for Anti-Aging > A Colorado Springs family doctor on using tretinoin for fine lines and sun damage: how to start, how much to apply, managing irritation, and sunscreen. Source: https://www.collinbennett.com/note-tretinoin-anti-aging Peak Health, PLLC (Colorado Springs, CO) is not open yet and is not seeing patients. To hear first, join the waitlist at https://www.collinbennett.com/#waitlist. General education, not medical advice. --- Health note # How to use tretinoin for anti-aging The best-studied cream for aging skin works, if you start slowly and stick with it. Written by [Collin R. Bennett, MD](https://www.collinbennett.com/about), board-certified family physician. Updated November 7, 2026. The short answer - Tretinoin is a prescription retinoid with decades of trial evidence for fine wrinkles, rough texture and sun spots. Start with 0.025%, use a pea-sized amount on completely dry skin at night, and ramp up from two nights a week to nightly. - Expect dryness and redness in the first weeks and visible results in 3 to 6 months. Wear sunscreen every day, and don't use it if you're pregnant or trying to become pregnant. Tretinoin is a prescription form of vitamin A for the skin. It's best known for acne, but it's also one of the few skin treatments with strong evidence against aging from the sun. In a classic controlled trial published in *JAMA* in 1988, nightly tretinoin improved fine wrinkles, roughness and sun spots compared with a plain cream. A lower-strength cream is FDA approved for fine facial wrinkles. Living at altitude in Colorado, with more UV and lots of time outdoors, our skin takes more sun than most. The challenge is irritation. Many people give up on tretinoin in the first few weeks because their skin gets red and flaky. Starting slowly prevents most of that. Dermatologist Dr. Sam Ellis has a [good video on starting tretinoin](https://www.youtube.com/watch?v=MT4DrMVbotE) that walks through choosing a strength, building a routine and handling side effects. ## Choose the right strength Almost everyone should start with the lowest strength, **0.025%**. For anti-aging, many people never need more. The higher strengths, 0.05% and 0.1%, are mostly used for stubborn acne rather than fine lines. Creams tend to be gentler than gels if your skin is dry or sensitive. ## Ramp up slowly Tretinoin is a marathon, not a sprint. Starting too fast is how people end up red and peeling. A typical schedule: - **Weeks 1 and 2:** two nights a week. - **Next:** every third night. - **Then:** every other night. - **Finally:** nightly, once your skin is comfortable. Stay at each step for a couple of weeks, and drop back a step if your skin gets irritated. ## How to apply it 1. Wash with a gentle cleanser, pat dry and wait until your skin is **completely dry**. Damp skin absorbs more and stings more. 2. Use a pea-sized amount for your whole face. More doesn't work better, it just irritates more. 3. Dot it on your forehead, cheeks and chin, then spread it in a thin layer. Avoid the sensitive skin right around your mouth and nose, and your eyelids. 4. Follow with a gentle, fragrance-free moisturizer. **The sandwich method:** if your skin is sensitive, put a thin layer of moisturizer on first, then tretinoin, then moisturizer again. The buffer softens the irritation without stopping it from working. The neck is more sensitive than the face. If you treat it, start even less often there and use the sandwich method. ## Purging or irritation? - **Purging** is a temporary breakout as tretinoin clears out clogged pores. It shows up where you usually break out and settles within about 6 to 8 weeks. - **Irritation** is a stressed skin barrier: redness, stinging, burning and peeling that keeps going. That's a sign to slow down, not push through. ## What to expect - **Weeks 1 to 6:** some dryness, redness, flaking or a mild sting is normal. It usually settles as your skin adjusts. - **Months 3 to 6:** smoother texture, more even tone and softer fine lines start to show. - **Beyond:** improvement keeps building with steady use. It works best as a long-term habit. ## Protect your skin while you use it - **Wear sunscreen every morning,** SPF 30 or higher, even in winter. Tretinoin makes skin more sensitive to the sun, and sun exposure undoes its benefits. - **Keep the rest of your routine simple.** Skip scrubs, strong acids and other harsh products at first. - **Pause before waxing** your face, since tretinoin can make the skin tear. - **If irritation gets ahead of you,** take a few nights off, let your skin recover with moisturizer, then restart less often. If you still can't tolerate it, ask your dermatologist about a different retinoid, such as tazarotene, or a gentler non-prescription option. ## Who shouldn't use it Don't use tretinoin if you're pregnant, trying to become pregnant or breastfeeding without talking to your doctor first. Be cautious if you have eczema or rosacea on your face, and tell your doctor about other medicines that make you sun-sensitive. Tretinoin needs a prescription. Over-the-counter retinol is a gentler, weaker option if you'd rather start there. Sources: Weiss JS, Ellis CN, Headington JT, et al. Topical tretinoin improves photoaged skin: a double-blind vehicle-controlled study. *JAMA*. 1988;259(4):527–532. Renova (tretinoin cream) 0.02% prescribing information, dosage and precautions. [drugs.com](https://www.drugs.com/dosage/renova-cream.html). Ellis S. How to hack tretinoin to make it work 10x better. Derm Office Hours. April 3, 2026. 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