Skin flooding
Layering hydrating serums on damp skin
'Skin flooding' is the 2023–25 name TikTok gave to layering humectants on damp skin and sealing them, and it has been covered by local news and dermatology practices as the rare trend they can endorse.
A trend we can live with. It is moisturising done in the right order, and the right order matters more than the brand of any layer.
Reviewed against the Aesthetics International standard. Category: Viral routines.
Does Skin flooding work?
Trend. A trend we can live with. It is moisturising done in the right order, and the right order matters more than the brand of any layer. There are no trials of 'skin flooding' as such.
- Verdict
- Trend Popular for reasons that are mostly social. Harmless at best; manage expectations.
- Evidence base
- 3 PubMed-indexed studies cited below, including randomised trials.
- Suits
- Dehydrated, over-exfoliated or retinoid-irritated skin; dry or air-conditioned environments; the days after a laser or peel.
- Not for
- Oily, acne-prone or fungal-acne-prone skin that congests under layers. It will not treat pigment, lines or laxity.
- In Singapore
- A routine using notified cosmetics; no regulation applies.
- Category
- Viral routines
- Reviewed
- 1 October 2026 by Aesthetics International. Revised as evidence and regulation change.
What it is
A routine rather than a product: mist or dampen the face, apply a hyaluronic acid or glycerin serum, sometimes a second hydrating layer, then seal with a moisturiser. It is Korean layering under a new name, aimed at dehydrated, tight or flaky skin.
How it works
Humectants pull water into the upper epidermis, and applying them to damp skin gives them water to hold rather than drawing it from deeper layers in dry air. The occlusive moisturiser on top slows evaporation, so the hydration lasts hours rather than minutes. What decides the result is the final seal and the ambient humidity, not the number of layers; in Singapore's humidity the drawing-water-out problem is mostly theoretical.
What the evidence says
There are no trials of 'skin flooding' as such. The components are well studied: topical hyaluronic acid of mixed molecular weights improved xerosis in a double-blind RCT, a cross-linked HA serum improved skin hydration and biomechanics in a split-face RCT, and reviews of barrier physiology support humectant-plus-occlusive layering. Evidence that more than two layers adds anything is absent, and acne-prone skin can do worse with heavier seals.
What people are saying
Paraphrased from public discussion on TikTok, Instagram, Reddit and in the press. Not testimonials, and not about any one clinic. Reported in: click2houston.com, westlakedermatology.com.
What the studies show
- RCT
Topical hyaluronic acid formulations improved dryness and hydration measures in older adults with xerosis compared with vehicle.
Effectiveness of topical hyaluronic acid of different molecular weights in xerosis cutis treatment in elderly: a double-blind, randomized controlled trial — Arch Dermatol Res, 2024. PMID 38829483.
- RCT
A cross-linked hyaluronic acid serum improved hydration and biomechanical measures on the treated side after procedures.
Prospective, Randomized, Investigator-Blinded, Split-Face Evaluation of a Topical Crosslinked Hyaluronic Acid Serum for Post-Procedural Improvement of Skin Quality and Biomechanical Attributes — J Drugs Dermatol, 2018. PMID 29601621.
- review
Humectants, occlusives and barrier lipids restore hydration through complementary mechanisms, supporting layered moisturisation.
The Skin Barrier and Moisturization: Function, Disruption, and Mechanisms of Repair — Skin Pharmacol Physiol, 2023. PMID 37717558.
Studies are selected for relevance and quality, not for agreement with the verdict; PubMed records are linked so the reader can check them.
Who it suits
Suits
Dehydrated, over-exfoliated or retinoid-irritated skin; dry or air-conditioned environments; the days after a laser or peel.
Not for
Oily, acne-prone or fungal-acne-prone skin that congests under layers. It will not treat pigment, lines or laxity.
Alternatives
The two reviewed treatments most often weighed against Skin flooding, on the same standard.
| Skin flooding | Niacinamide | Laser Genesis | |
|---|---|---|---|
| Verdict | Trend | Established | Promising |
| What it is | A routine rather than a product: mist or dampen the face, apply a hyaluronic acid or glycerin serum, sometimes a second hydrating layer, then seal with a moisturiser. | Niacinamide is vitamin B3 in its amide form, a water-soluble ingredient used at two to ten per cent in serums and moisturisers. | A 1064 nm Nd:YAG laser fired in rapid microsecond pulses across the face without contact, gently warming the upper dermis to around 40–42 °C for several minutes. |
| Evidence base | 3 PubMed-indexed studies cited below, including randomised trials. | 3 PubMed-indexed studies cited below, including randomised trials. | 3 PubMed-indexed studies cited below, including systematic reviews, randomised trials. |
| Suits | Dehydrated, over-exfoliated or retinoid-irritated skin; dry or air-conditioned environments; the days after a laser or peel. | Almost everyone: oily, blotchy, acne-prone or barrier-compromised skin, and as a tolerable companion to retinoids and acids. | Mild diffuse redness and rosacea-prone skin in people who cannot have any downtime; maintenance between stronger treatments; darker skin where IPL is unwise. |
| In one line | A trend we can live with. It is moisturising done in the right order, and the right order matters more than the brand of any layer. | It will not change a face, but it makes everything else in the routine easier to tolerate, which is worth more than most hero ingredients deliver. | The wavelength is capable of far more than this protocol asks of it; the gentleness that sells it is also its ceiling. |
Risks
Congestion and breakouts with heavy seals, irritation from fragranced mists, and little else.
In Singapore
A routine using notified cosmetics; no regulation applies. Post-procedure versions of the same idea are standard clinic advice.
“A trend we can live with. It is moisturising done in the right order, and the right order matters more than the brand of any layer.”
Vetted protocols on the same problem
Questions
How many layers is enough?
Is skin flooding good for acne-prone skin?
Should I do it after a laser?
Cite this review
Aesthetics International (2026). Skin flooding: does it work? Evidence, risks and verdict. https://aesthetics-international.org/treatments/skin-flooding/ (reviewed 1 October 2026).
Editorial, unpaid and independent of any manufacturer. Verdict: Trend. See what works and what doesn't across all 153 reviews. Spotted an error or a newer study? Suggest a correction — changes are logged on the corrections page. Terms are defined in the glossary.
Where this review is used
Have a question about this treatment?
Ask us — or ask to be matched with a practitioner in Singapore who follows evidence-based treatment. Whether it is right for you is decided at an in-person assessment, not by a review; sometimes the answer is a different treatment, or none.
WhatsApp +65 8023 7170Suggest a treatment to review
Physicians, manufacturers and readers can propose a treatment for review. Reviews are editorial and are not paid for.
[email protected]