7 Common Skincare Myths, Debunked: What the Evidence Actually Says | LOVESKIN

Common Myths vs evidence based advice in New Zealand Skincare

 

Skincare myths rarely begin as nonsense. More often, they take one piece of truth and stretch it into a rule that supposedly applies to everyone or in another context. 

If a product tingles, it must be working. Oily skin should avoid moisturiser. Natural ingredients are always gentler. Pores open with hot water. Skin needs to detox.

These ideas are repeated so often that they can begin to sound like established skincare facts. But skin is more complicated—and more individual—than most simple rules allow.

At LOVESKIN, we believe good skincare starts with understanding what your skin is doing now, rather than forcing it into a fixed category or following every new skincare trend. Here are seven common skincare myths and what the available evidence actually tells us.

 

Myth 1: If skincare tingles or stings, it must be working

The verdict: Mostly false.

A tingling sensation is not a measure of how effective a skincare product is.

Certain ingredients, particularly low-pH exfoliating acids, may cause a mild and brief sensation when first applied. But stronger stinging does not mean an ingredient is penetrating more deeply, working faster or delivering a better result.

Burning, persistent stinging, itching, swelling or increasing redness can instead be signs of irritation, a compromised skin barrier or contact dermatitis. Stinging and burning are also recognised features of sensitive skin syndrome. [reference 1]

Pay particular attention if:

• the sensation becomes stronger rather than settling;
• your skin remains red or hot;
• the product suddenly stings when it did not previously;
• even normally gentle products begin to burn;
• you develop itching, swelling, flaking or a rash.

When several products begin to sting at once, the problem may not be every individual formula. Your skin barrier may have become more permeable and reactive following over-exfoliation, harsh cleansing, environmental exposure or the combined effects of too many active products.

What to do instead: Stop using the product responsible for significant discomfort. Simplify your routine and concentrate on gentle cleansing, hydration and barrier support. Persistent burning, swelling or a spreading rash should be assessed by a health professional.

A skincare product does not have to hurt to be effective.

 

Myth 2: Natural skincare is always safer and gentler

The verdict: False.

“Natural” describes an ingredient’s origin. It does not tell us whether the ingredient is effective, irritating, allergenic or suitable for a particular person.

Plants naturally produce complex chemical compounds. Some can be highly beneficial in skincare; others can irritate or sensitise susceptible skin. Essential oils, botanical fragrance compounds and certain plant extracts are recognised causes of allergic contact dermatitis. [References 2,3]

Synthetic ingredients are not automatically harsh, either. Many are created or purified specifically to improve stability, consistency, preservation or skin tolerance.

What matters is not whether an ingredient grew in the ground or was produced in a laboratory. What matters is:

• the identity and purity of the ingredient;
• how much is used;
• how it is processed;
• the complete formulation;
• how it interacts with other ingredients;
• the condition of the person’s skin;
• the quality and safety testing behind the product.

This does not mean natural ingredients are bad. LOVESKIN uses carefully selected plant oils and New Zealand botanicals where they have a clear purpose. But we do not assume that natural origin alone makes an ingredient gentle—or that every botanical will suit every skin.

What to do instead: Judge the complete formula, not a marketing category. If your skin is reactive or allergy-prone, introduce new products gradually and patch test before applying them widely.

Natural and evidence-based skincare can coexist. The evidence still has to come first.

 

Myth 3: Oily or acne-prone skin does not need moisturiser

The verdict: False.

Oiliness and hydration are not the same thing.

Sebum is the oily substance produced by the sebaceous glands. Skin hydration refers largely to the water content of the outer skin layers and the skin barrier’s ability to limit excessive water loss.

This means skin can produce plenty of oil while still feeling tight, dehydrated, flaky or irritated. Acne-prone skin may also have impaired barrier function, and common acne treatments—including retinoids and benzoyl peroxide—can increase dryness, peeling and irritation. [references 4,5]

A 2023 controlled study found that a ceramide-containing oil cleanser and moisturiser used alongside adapalene and benzoyl peroxide reduced dryness, redness and scaling and improved measures of barrier function compared with basic cleansing alone. [Reference 5]

What to look for:

• humectants such as glycerin;
• barrier-supportive lipids;
• a texture you can use consistently;
• a formula designed with acne-prone or reactive skin in mind;
• minimal unnecessary fragrance if your skin is sensitive.

Facial oisl and moisturiser is not intended to make oily skin oilier. Its role is to support hydration, comfort and barrier function.

What to do instead: Avoid trying to “dry out” acne with aggressive cleansing, alcohol-heavy products and repeated exfoliation. Treat the factors involved in acne while continuing to support the surrounding skin.

Acne is an inflammatory condition of the pilosebaceous unit. It is not evidence that your entire face needs to be stripped of moisture or lipids.

 

Myth 4: All face oils clog pores and cause acne

The verdict: False—but the opposite claim is also false.

It is inaccurate to say that every face oil clogs pores. It is equally inaccurate to promise that an oil can never contribute to congestion.

Plant oils are not interchangeable. They differ in fatty-acid composition, oxidation stability, texture and their effects on the skin barrier. Research comparing olive oil with sunflower seed oil, for example, found significantly different effects on adult skin-barrier integrity. [Reference 6]

Whether a facial oil suits someone with acne-prone skin can depend on:

• the particular oils used;
• the ratios in which they are blended;
• the quantity applied;
• the complete routine;
• other products layered underneath;
• the person’s individual susceptibility to congestion;
• whether the skin is dry, irritated or undergoing acne treatment.

Online “comedogenicity ratings” can make this appear much simpler than it is. A single number assigned to one ingredient cannot reliably predict how an entire finished formula will behave on every person’s skin.

Facial oils can act as emollients, reducing roughness and supplementing surface lipids. Some people with acne-prone skin find a carefully formulated oil very effective, particularly when their skin is also dry or irritated. Others may prefer a lighter emulsion or oil-free product.

Importantly, a cosmetic face oil is not, by itself, an evidence-based treatment for moderate or severe acne. Persistent, painful, nodular or scarring acne deserves appropriate medical assessment.

What to do instead: Choose facial oils according to their formulation and your current skin state. Begin with a small amount, monitor how your skin responds over several weeks and stop if congestion consistently worsens.

The better question is not, “Are oils good or bad?” It is, “Is this particular formula appropriate for my skin?”

 

Myth 5: Hot water opens your pores and cold water closes them

The verdict: False.

Pores do not open and close like doors.

What we commonly call a pore is the visible opening of a hair follicle and its associated sebaceous gland. Pores do not contain tiny muscles that open when exposed to heat and close when exposed to cold.

Warm water can soften surface oil and help a cleanser remove makeup, sunscreen and excess sebum. Heat may also increase blood flow and make pores temporarily appear more noticeable. Cold water can temporarily change blood flow and the way skin looks or feels, but it does not physically close the follicular opening.

Research associates the appearance of enlarged facial pores primarily with factors including:

• higher sebum output;
• reduced elasticity around the pore;
• the size of the hair follicle;
• age and sun-related structural changes. [Reference 7]

You cannot permanently erase pores, and you need them. However, ingredients and treatments that address excess sebum, follicular congestion or reduced skin elasticity may make them appear less prominent.

What to do instead: Cleanse with comfortably lukewarm water. Very hot water can increase dryness and irritation, particularly when the skin barrier is already compromised.

Use a gentle cleanser consistently rather than attempting to steam, squeeze or shock pores into opening and closing.

 

Myth 6: Your skin needs to detox

The verdict: Misleading.

“Detox” is one of skincare’s most persuasive—and least clearly defined—words.

The skin performs essential functions. It protects the body, helps regulate temperature, provides sensation and limits excessive water loss. Sweat glands produce sweat primarily to regulate body temperature. [Reference 8]

There is no established cosmetic mechanism through which a cleanser, mask or facial oil draws unspecified systemic “toxins” out through the pores.

A skincare product may still:

• remove makeup, sunscreen, pollution particles and excess surface oil;
• help loosen material within clogged follicles;
• gently exfoliate accumulated surface cells;
• support the skin barrier;
• improve the appearance and feel of congested skin.

Those are meaningful cosmetic functions. They do not need to be described as detoxification.

The word also becomes problematic when normal reactions are presented as proof that toxins are leaving the skin. A worsening rash, sudden breakout or burning sensation should not automatically be dismissed as “purging” or “detoxing.”

Some active ingredients that increase cell turnover can cause a temporary change in how existing comedones emerge. But many reactions attributed to purging are simply irritation, intolerance or worsening of the underlying condition.

What to do instead: Look for specific, measurable explanations. Does the product cleanse? Exfoliate? Reduce excess surface oil? Support hydration? Improve barrier function?

Clear claims are more useful than vague promises to remove toxins.

 

Myth 7: Your skin type stays the same for life

The verdict: False.

Your genetics influence how your skin tends to behave, but skin is not static.

Sebum production, hydration, barrier function, sensitivity and the appearance of pores can change with:

• age;
• hormonal shifts;
• menstrual cycles, pregnancy, perimenopause and menopause;
• temperature and humidity;
• seasonal changes;
• sun exposure;
• stress and illness;
• medications and medical treatments;
• cleansing and skincare habits;
• overuse of exfoliants or active ingredients.

Research has found that women’s sebum production tends to decrease progressively across the lifespan. Environmental studies also show that low temperature and low humidity can reduce skin-barrier function, while measurements of facial moisture and lipid production vary between seasons. [References 9–11]

This helps explain why a routine that worked perfectly two years ago—or even two months ago—may no longer feel right.

You may have an underlying tendency towards dryness, oiliness or sensitivity, but what matters when choosing skincare is also your current skin state.

Skin that is normally oily may become dehydrated after aggressive acne treatment. Previously resilient skin may become reactive during perimenopause. Dry skin may need more support through winter and less occlusion in humid weather.

What to do instead: Reassess your skin periodically. Pay attention to how it feels by midday, what has changed recently and what you are trying to address now.

You do not necessarily need to replace your entire routine every time your skin changes. Often, the best response is to maintain a gentle foundation and adjust one targeted step.

Your skin does not have to follow the same rules forever. Your skincare should be able to change with it.

 

What does evidence-based skincare actually look like?

Evidence-based skincare is not about rejecting natural ingredients, avoiding every sensory experience or reducing your routine to one universal formula.

It means being more precise.

It means asking:

• What is this product intended to do?
• Is there reasonable evidence behind the ingredients and approach?
• Is the formula appropriate for my skin right now?
• Can I use it consistently without creating unnecessary irritation?
• Am I treating a cosmetic concern—or something that needs professional care?

For most people, a good routine begins with a few foundations: appropriate cleansing, hydration and barrier support, targeted treatment where needed, and daily sun protection.

More products do not automatically create better results. More aggressive products do not automatically work faster. And the product everyone else loves may not be the product your skin needs.

 

Frequently asked questions about skincare myths

Does skincare need to tingle to work?

No. Some low-pH or highly active products may create a brief mild sensation, but tingling is not a measure of effectiveness. Persistent stinging, burning, itching or redness can indicate irritation.

Do pores really open and close?

No. Pores do not contain muscles that open and close in response to water temperature. Warm water may soften surface oil, but it does not open pores, and cold water does not close them.

Is natural skincare better for sensitive skin?

Not automatically. Natural ingredients can be beneficial, but botanical extracts, essential oils and fragrance compounds can also cause irritation or allergic contact dermatitis. The complete formulation matters more than a natural or synthetic label.

Does oily skin need moisturiser?

Often, yes. Oily skin can still be dehydrated or have impaired barrier function. Choose a moisturiser with a texture and composition appropriate for oily or acne-prone skin.

Does face oil clog pores?

Some oils or oil-based formulas may not suit some acne-prone skins, while others may be well tolerated. The result depends on the oil, complete formulation, amount used and individual skin response.

Can your skin type change?

Your underlying tendencies may remain, but your skin state can change significantly with age, hormones, climate, health, medication and skincare habits. Your routine should respond to what your skin is doing now.

 

Care for the skin you have now

Skin is personal. It changes, reacts and does not always fit neatly into a standard skin type.

Rather than following rigid skincare rules, begin with what your skin is telling you. Keep the foundations gentle and consistent. Add targeted care with purpose. And when your skin changes, give yourself permission to change your routine with it.

Not sure what your skin needs right now? Take the LOVESKIN Skin Analysis for personalised guidance based on your current skin concerns.

This article provides general skincare education and is not a substitute for diagnosis or medical treatment. Seek professional advice for persistent rashes, sudden skin changes, painful or scarring acne, swelling, infection or ongoing irritation.

 

References

1. Wollenberg A, Giménez-Arnau A. Sensitive skin: a relevant syndrome, be aware. Journal of the European Academy of Dermatology and Venereology. 2022;36 Suppl 5:3–5. doi:10.1111/jdv.17903.
2. Jack AR, Norris PL, Storrs FJ. Allergic contact dermatitis to plant extracts in cosmetics. Seminars in Cutaneous Medicine and Surgery. 2013;32(3):140–146. doi:10.12788/j.sder.0019.
3. González-Muñoz P, Conde-Salazar L, Vañó-Galván S. Allergic contact dermatitis caused by cosmetic products. Actas Dermo-Sifiliográficas. 2014;105(9):822–832. doi:10.1016/j.ad.2013.12.018.
4. Schachner LA, Alexis AF, Andriessen A, et al. Insights into acne and the skin barrier: optimizing treatment regimens with ceramide-containing skincare. Journal of Cosmetic Dermatology. 2023;22(11):2902–2909. doi:10.1111/jocd.15946.
5. Draelos ZD, Baalbaki N, Colon G, Dreno B. Ceramide-containing adjunctive skin care for skin barrier restoration during acne vulgaris treatment. Journal of Drugs in Dermatology. 2023;22(6):554–558. doi:10.36849/JDD.7142.
6. Danby SG, AlEnezi T, Sultan A, et al. Effect of olive and sunflower seed oil on the adult skin barrier: implications for neonatal skin care. Pediatric Dermatology. 2013;30(1):42–50. doi:10.1111/j.1525-1470.2012.01865.x.
7. Lee SJ, Seok J, Jeong SY, Park KY, Li K, Seo SJ. Facial pores: definition, causes, and treatment options. Dermatologic Surgery. 2016;42(3):277–285. doi:10.1097/DSS.0000000000000657.
8. Baker LB. Physiology of sweat gland function: the roles of sweating and sweat composition in human health. Temperature. 2019;6(3):211–259. doi:10.1080/23328940.2019.1632145.
9. Engebretsen KA, Johansen JD, Kezic S, Linneberg A, Thyssen JP. The effect of environmental humidity and temperature on skin barrier function and dermatitis. Journal of the European Academy of Dermatology and Venereology. 2016;30(2):223–249. doi:10.1111/jdv.13301.
10. Luebberding S, Krueger N, Kerscher M. Skin physiology in men and women: in vivo evaluation of 300 people including transepidermal water loss, hydration, sebum content and skin-surface pH. International Journal of Cosmetic Science. 2013;35(5):477–483. doi:10.1111/ics.12068.
11. Meyer K, Pappas A, Dunn K, et al. Evaluation of seasonal changes in facial skin with and without acne. Journal of Drugs in Dermatology. 2015;14(6):593–601.
12. Reynolds RV, Yeung H, Cheng CE, et al. Guidelines of care for the management of acne vulgaris. Journal of the American Academy of Dermatology. 2024;90(5):1006.e1–1006.e30. doi:10.1016/j.jaad.2023.12.017.