MD Dermatology · 25+ yrs international practice
Dermatologist's quick take
- PM routine = double cleanse, treat, repair — five steps maximum
- Retinoids are the single most evidence-backed PM ingredient
- Wait 10–20 minutes after washing before applying retinol to reduce irritation
- Hydration peaks at night; layer humectants under occlusives
- Use one active per evening — combining retinol with acids ages skin faster
I have spent 25 years in dermatology clinics across Africa, Asia and the Middle East, and the single most common mistake I see in PM routines is doing too much, too aggressively, too often. The skin's overnight job is repair — not aggressive resurfacing. Your job is to support that repair, not interrupt it.
I'm Dr. Urhekar, and this is the PM routine I prescribe to most adults: five steps, three actives maximum, and one rest night per week. For more from our team, see the full Ask a Dermatologist series, or try a free AI skin analysis from ScanSkinAI to baseline your skin first.
What your skin does at night
Between 10pm and 4am, skin enters its peak repair window: cell turnover accelerates by roughly 30%, transepidermal water loss increases (so hydration is critical), and DNA repair from daytime UV damage occurs. Your routine should hydrate, supply repair signals (retinoids, peptides), and seal in moisture — in that order.
The five-step PM routine
Step 1 — Double cleanse (if needed)
First cleanse: oil cleanser or micellar water to dissolve sunscreen, makeup and pollution. Second cleanse: gentle gel or cream cleanser to clean the skin itself. If you've worn nothing but sunscreen, one thorough cleanse is enough.
Cleansing without damaging the barrier
- Lukewarm water only — hot water destroys ceramides
- 30–60 seconds of massage; not 5 minutes
- Pat dry, never rub
- Apply next product within 60 seconds (the damp skin rule)
Step 2 — Hydrating toner or essence (optional)
A simple humectant toner with hyaluronic acid, polyglutamic acid or panthenol primes the skin and helps subsequent products absorb. This step is genuinely optional — it's the easiest one to skip if you're trying to simplify.
Step 3 — Treatment serum (one active per night)
This is where the real work happens. Pick one of the following per night:
Retinol/Retinoid
Resurfacing + collagen. 3–4 nights/week. Build up slowly.
AHA / BHA
Exfoliation. 1–2 nights/week. Never with retinol on the same night.
Peptides / niacinamide
Daily-safe. Pair with retinoid the morning after.
Step 4 — Moisturiser
Richer than your AM moisturiser. Look for ceramides, squalane, peptides and panthenol. If you've used retinol, apply moisturiser 10–20 minutes after to reduce irritation (the 'sandwich method' — moisturiser, retinol, more moisturiser — is also valid for sensitive skin).
Step 5 — Occlusive (slugging, optional)
For very dry or compromised barriers, a thin layer of pure petrolatum (Vaseline / Aquaphor) on top of moisturiser locks in everything for the night. Skip if oily or acne-prone — petrolatum is not comedogenic, but the trapped sebum can be.
Common PM routine mistakes
- Combining retinol with AHA/BHA the same night (use alternate nights)
- Applying retinol immediately after washing — wait 10–20 minutes
- Using fragranced products at night (irritation peaks while skin repairs)
- Skipping moisturiser because skin "feels oily" — it isn't, it's dehydrated
- Daily retinol from week one — go slow to avoid retinoid dermatitis
Adjusting by age and concern
20s: hydration is the headline. A simple cleanse + hyaluronic acid + moisturiser routine is enough. Add retinaldehyde 0.05% twice a week from late twenties for prevention.
30s: introduce a true retinoid (retinol 0.3% or retinaldehyde 0.1%) 3 nights/week. Add peptides on rest nights.
40s+: nightly retinoid as tolerated, peptides on rest nights, richer moisturiser, and consider a growth-factor serum. See our full anti-ageing skincare guide.
Skin of colour at any age: retinoids are particularly powerful for both ageing and hyperpigmentation, but the irritation that comes with them can worsen pigmentation if you go too fast. Build up over 12+ weeks. See hyperpigmentation causes and treatments.
Sleep itself is part of skincare
7–9 hours
Below 6 hours measurably accelerates skin ageing in 30-day studies.
Silk pillowcase
Reduces friction creases and absorbs less product than cotton.
Sleep on back
Eliminates pressure creases entirely if you can adapt.
How to know it's working
Real changes from a PM routine take 8–12 weeks to be visible. Take a baseline photo today and compare every 4 weeks. ScanSkinAI stores your scan history so you can see objective changes in pigmentation, texture and fine lines — without relying on memory or lighting tricks.
Track skin changes overnight
Take a baseline AI skin scan now and compare in 12 weeks.
Frequently Asked Questions
Only if you've worn sunscreen, makeup, or been in heavy pollution. The first cleanse (oil or balm) lifts oil-soluble grime; the second (gel or cream) cleans the skin itself. If you wear nothing but sunscreen, one thorough cleanse is fine.
Start at 1–2 nights per week and build up over 8–12 weeks to nightly use as tolerated. If you experience peeling or redness, drop back. Always pair with daily SPF — retinol thins the stratum corneum temporarily, increasing UV vulnerability.
No. Both increase cell turnover and barrier sensitivity. Alternate nights — retinol on Mondays, Wednesdays, Fridays; AHA/BHA on Tuesdays, Thursdays, Saturdays; rest on Sundays. This is one of the most common mistakes I see.
Yes — long-term. Pressure creases (worse on cotton pillowcases) become permanent fine lines after years. A silk or satin pillowcase reduces friction; sleeping on your back is even better but few people manage it consistently.
Within 60 seconds, ideally — the 'damp skin rule'. This locks in roughly 10× more moisture than waiting until skin is fully dry. Don't dry your face vigorously with a towel; pat gently or air-dry.
Useful for very dry or mature skin as the final step (an occlusive layer to seal in moisture). For oily or acne-prone skin, skip them — most facial oils are mildly to moderately comedogenic.
Dr. Anand S. Urhekar
VerifiedMD Dermatology · 25+ yrs · Section Head, M.P. Shah Hospital Nairobi · Former UN Dermatologist
Dr. Urhekar is a board-certified dermatologist with over 25 years of practice across Africa, the Middle East and Asia. As Section Head of Dermatology at M.P. Shah Hospital Nairobi and a former UN dermatologist, he specialises in tropical skin disease, Fitzpatrick IV–VI skin care and global health.