Skincare Myths That Dermatologists Are Tired of Hearing

Pore size is largely determined by genetics, skin type, and the amount of sebum (oil) inside a pore. Steam can soften the material inside a pore and temporarily make extractions easier, but it does not physically open anything. Similarly, cold water may cause a mild temporary tightening sensation in the skin, but it does not shrink pores. Repeated aggressive steaming can actually irritate the skin barrier. If pore appearance concerns you, topical retinoids and consistent exfoliation are the approaches with the most evidence behind them.

Skin hydration is primarily maintained by the outermost layer of the skin — the stratum corneum — and by the lipids and proteins that form the skin barrier. While severe systemic dehydration can affect skin appearance, drinking extra water beyond your body's needs has not been shown in clinical research to meaningfully improve skin hydration or reduce acne. Surface dryness is better addressed with topical humectants like glycerin or hyaluronic acid and occlusives that seal moisture in. See our related piece on why moisturizers sometimes underperform for ingredient guidance.

SPF ratings are determined in lab conditions using 2 mg of product per square centimeter of skin — an amount most people don't apply even with a dedicated sunscreen, let alone a sheer foundation. Studies suggest people typically apply 20–50% of the required amount. When that shortfall is combined with the already-thin layer of makeup most people wear, the effective protection is a fraction of what the label states. Applying a separate broad-spectrum SPF 30 or higher as a dedicated step — before makeup — is the standard recommendation from dermatology organizations. For practical guidance on consistent use, daily sunscreen habits and common skips is worth reading.

'Natural' is not a regulated term in the U.S. cosmetics industry, meaning companies can use it loosely. Many plant-derived ingredients — including certain essential oils, citrus extracts, and botanical fragrances — are among the most common causes of allergic contact dermatitis. Conversely, many synthetic ingredients have extensive safety profiles and are specifically designed to minimize irritation. The relevant question is always whether an ingredient is well-tolerated and effective for your skin type, not its origin. Checking ingredient lists and patch-testing new products, whether 'natural' or not, is a more reliable approach than trusting marketing labels.

The skin maintains a protective barrier composed of lipids, good bacteria, and proteins. Washing too frequently — or using harsh cleansers — disrupts this barrier, leading to irritation, tightness, and sometimes a rebound increase in sebum production as the skin tries to compensate. For most skin types, cleansing twice daily with a gentle, non-stripping formula is sufficient. If midday oiliness is a concern, blotting papers address the symptom without damaging the barrier. A compromised barrier also makes active ingredients more likely to cause stinging or irritation — see signs of a damaged skin barrier for more detail.