SkincareSafety Guide

Skin

Understand your skin type, tone, and what your skin is doing.

View all skin guides

Start here

Skin typesThe main skin types and how they differ.Find your skin typeA practical identification guide.What different skin types look likeVisual differences between common skin types.

Common skin questions

Oily skinWhat oily skin means and how to read it.Skin type changesHow skin type can shift over time.Skin type and ageHow visible aging differs by skin type.
Not sure where to start?Use the skin-type guide before choosing routines or ingredients.

Concerns

Start from a skin problem or visible change.

View concern guides

Oil and acne

Why oily skin happensThe main drivers behind excess oil.Oily skin and acneHow oil can contribute to breakouts.Can oily skin cause acne?A direct answer to the oil-acne link.

Changes and warning signs

Stress and oily skinHow stress may affect oiliness.Dehydration and oilinessWhy skin can feel oily and dehydrated.Skin cancer signsVisual signs that need professional attention.
Looking for a solution?Start with what oily skin actually needs before adding stronger products.

Ingredients

Understand what ingredients do and whether they fit your skin.

View ingredient questions

Explore ingredients

NiacinamideA practical ingredient overview.Vitamin C serumWho can use vitamin C and when to be careful.RetinolHow retinol fits different skin types.

Use safely

Salicylic acidWhere this acne-focused ingredient fits.Niacinamide for all skin typesSuitability across skin types.Ingredient comparisonsUse comparisons to avoid mismatched decisions.
Can my skin use this?Browse compatibility questions before adding a new active.

Routines

Turn skin information into daily decisions.

View routine questions

Daily basics

Does every skin type need moisturizer?A basic routine decision.Does every skin type need sunscreen?Where SPF fits in daily care.What oily skin needsA simple care direction for oily skin.

Adjust over time

Skin changes with ageWhen your routine may need to change.Seasonal skin changesHow weather affects skin behavior.Korean skincare approachWhat is useful beneath the trend.
Starting from scratch?Begin with moisturizer, sunscreen, and one skin-specific need.

Products

A small selection of skincare products recommended by OuterDerm for simple, effective everyday routines.

View all products

Recommended picks

Daily SunscreenDaily UV protection that has to be wearable enough to stick with.Azelaic AcidA focused 10% azelaic acid when uneven tone or blemish marks are the concern.Gentle CleanserComfortable cleansing when tight or squeaky skin is a warning sign.
Not sure where to start?Browse three carefully selected essentials, then ask on WhatsApp before you order.

Learn

Go deeper into skin science, myths, evidence, and safety.

View learning guides

Hazardous ingredients

Safety hubStart with mercury, steroids, PPD and other hazardous substances.Ingredient safety indexBrowse Phase 1 and Phase 2 hazardous ingredients.Mercury in whitening creamsLabel names, Punjab alerts, and what to do now.

Product literacy

Product literacy hubHow to read labels, claims, and INCI lists before you buy.How to read an ingredient labelINCI order, Parfum, and missing-list red flags.Fragrance-free vs unscentedHow to verify a fragrance-free claim on the ingredient list.How to choose sunscreenBroad spectrum, wearability, and a readable pack — not a fairness claim.

Skin science

Skin color geneticsHow inherited traits shape skin color.Skin color typesHow skin tone is commonly grouped.Are skin types genetic?What genetics can and cannot explain.

Evidence and myths

Can all skin types tan?Tanning, risk, and skin type.Is oily skin good or bad?A balanced view of oily skin.Why Korean skin looks flawlessTrend claims translated into practical basics.
Want the evidence layer?Use why-guides when you want causes, mechanisms, and context.

Skin Type Guide

How Can I Test My Face Skin Type?

Knowing your skin type is the single most important step in building a skincare routine that actually works. But figuring it out can feel surprisingly confusing when you're staring at your own reflection. Here are three simple, reliable tests you can do at home to finally know what you're working with.

Quick answerYou can test your face skin type using three simple methods: the bare-face test (wash your face, wait an hour, and observe how it feels and looks), the blotting paper test (press blotting paper to different areas and see how much oil it picks up), and the texture and reaction test (observe pore size, sensitivity, and how your skin responds to products).

Medically reviewed by Dermatology reviewer · Updated Jul 18, 2026 · 6 min read

Person looking in mirror while performing a skin type test on their face
Method 1Bare-face test
Method 2Blotting paper test
Method 3Texture observation test
Best TimeMorning, before washing
FrequencyTest seasonally

Key answer

Simple, reliable methods

These simple at-home tests are highly effective for identifying your skin type. For persistent concerns, consult a dermatologist.

Evidence
Moderate - Simple, reliable methods
Best for
First-time skin typing; Seasonal checks
Limitation
Diagnosing skin conditions

See what the evidence shows

Short version

Story in brief

Skin types are generally categorized into five main groups: oily, dry, combination, sensitive, and normal. Each type has distinct characteristics related to sebum production, barrier function, and reactivity. But many people have a combination of these traits, making identification tricky.

The most reliable way to determine your skin type is to observe your skin in its natural, unaltered state - without any products on it. This is why morning testing, before washing your face, gives you the most accurate results. Your nighttime skincare routine can temporarily change how your skin behaves.

These tests aren't medical diagnoses, but they're highly effective for personal skincare selection. If you have persistent skin concerns, a dermatologist can provide professional skin typing and treatment recommendations.

Mental model

Visual explanation

Evidence

What the evidence shows

These methods are supported by dermatological practice.

  • Tight, flaky, or rough?

    You likely have dry skin

  • Shiny T-zone, dry cheeks?

    You likely have combination skin

  • Shiny all over?

    You likely have oily skin

  • Reacts to products easily?

    You likely have sensitive skin

Use this section to decide

Does this advice apply to me?

Find the concern or goal closest to yours, then use the fit signal to decide how much weight to give this guide.
Strong fit means the advice is central to that goal.Depends means formula, tolerance, or context matters more.Use caution means do not treat it as the main answer.

  • If your goal is

    Best methodUsually relevant
    Fit signal
    Often useful

    Bare-face test

  • If your goal is

    Best timeUsually relevant
    Fit signal
    Often useful

    Morning, before washing

  • If your goal is

    FrequencyUse caution
    Fit signal
    Limited evidence

    Test seasonally

  • If your goal is

    AccuracyUsually relevant
    Fit signal
    Often useful

    Good for personal use

Research notes already in this guide

  • The bare-face test is widely recommended by dermatologists for personal skin typing.
  • Blotting paper tests are used in some clinical settings for sebum measurement.
  • These tests are reliable for identifying general skin type categories.
  • Individual variation means results should be interpreted with some flexibility.

Expected results

Results and timeframe

Test in the morning before washing your face for the most accurate results.

Practical use

How to use it

  1. Choose a testing method

    Start with the bare-face test for the most reliable results, then use the blotting paper test for confirmation.

  2. Test at the right time

    Test in the morning before washing your face or applying any products.

  3. Record your results

    Write down what you observed. Compare across different areas of your face.

Safety

Side effects and cautions

  • Testing right after washing your face

    Washing temporarily changes your skin. Wait at least an hour or test in the morning.

  • Testing only once and assuming it's permanent

    Test seasonally and as you age. Your skin type can change significantly.

  • Confusing skin type with skin condition

    Dehydrated skin can feel tight but still be oily. They're different things.

Fit

Who should be careful

  • Diagnosing skin conditions

Worth noting

Small details that can change the answer

  • Skin Type Changes. Your skin type can change with age, seasons, and hormonal shifts. Testing regularly helps you stay ahead of these changes.
  • Time of Day Matters. Testing in the morning before washing gives you the most accurate results about your natural skin state.
  • Product Interference. Your nighttime skincare routine can temporarily change how your skin behaves, so morning testing is best.
  • Professional Diagnosis. While these tests are reliable for personal use, a dermatologist can provide more detailed skin analysis.

The bare-face test, blotting paper test, and texture observation are three reliable methods for testing your skin type.

Your skin type can change with seasons, age, and hormones, so test regularly.

Skin type is different from skin condition - don't confuse the two.

If you're unsure, a dermatologist can provide professional skin typing.

Definition

What you need to know before you test

Before you start testing, there are a few important things to understand about skin typing.

  • Test in the morning before washing your face or applying any products
  • Don't test right after using active treatments like retinoids or acids
  • Test seasonally - your skin may change between winter and summer
  • Skin type is different from skin condition (like dehydration or acne)

Explanation

Method 2: The blotting paper test

This test gives you a visual measurement of oil production.

Explanation

Method 3: The texture and sensitivity test

This observation-based test helps you identify combination and sensitive skin traits.

Questions

Frequently asked questions

How do I know if I have combination skin?

If your T-zone is oily and your cheeks are dry or normal, you have combination skin. The blotting paper test clearly shows this pattern.

Can my skin type change?

Yes. Your skin type can change with age, seasons, hormones, and lifestyle factors.

Should I test my skin type on my body too?

Yes. Your face and body can have different skin types. Body skin is often less oily than facial skin.

What if I get different results on different days?

This is normal. Stress, sleep, weather, and diet can all affect your skin. Test on a 'typical' day for the most reliable results.

References

Sources

The notes below are drawn from the evidence already cited in this guide. They are not a complete bibliography.

  1. The bare-face test is widely recommended by dermatologists for personal skin typing.
  2. Blotting paper tests are used in some clinical settings for sebum measurement.
  3. These tests are reliable for identifying general skin type categories.
  4. Individual variation means results should be interpreted with some flexibility.