SkincareSafety Guide

Skin

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

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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.

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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.

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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.

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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.

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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 Conditions & Identification

What Does Hyperpigmentation Look Like?

Hyperpigmentation can appear in many forms - freckles, large patches, or small spots. Understanding what it looks like can help you identify the type and choose the right treatment.

Quick answerHyperpigmentation appears as darker patches, spots, or discoloration on the skin.

Medically reviewed by Dermatology reviewer · Updated Jul 18, 2026 · 5 min read

Illustration showing different appearances of hyperpigmentation on various skin tones
Common AppearanceDark patches or spots
PIH AppearanceFlat, dark spots after inflammation
SunspotsRound, brown patches
MelasmaLarger patches on face
Key LocationFace, hands, sun-exposed areas

Key answer

Recognizable condition

Hyperpigmentation can appear in different forms. Understanding the visual characteristics can help you identify the type and choose the right treatment.

Evidence
Moderate - Recognizable condition
Best for
Anyone wanting to identify hyperpigmentation on their skin
Limitation
Those seeking a definitive diagnosis, which requires a dermatologist

See what the evidence shows

Short version

Story in brief

Hyperpigmentation can vary widely in appearance. It can be as small as a freckle or as large as a patch covering the entire cheek. The color can range from light brown to dark black, depending on the skin tone and the type of hyperpigmentation.

PIH typically appears as flat, dark spots in areas where the skin has been inflamed. These spots are often small and scattered. Sunspots are round, brown patches that appear on areas exposed to the sun. Melasma appears as larger, darker patches on the face, often in a symmetrical pattern.

The location of the pigmentation can also be a clue. PIH is usually found where inflammation occurs (face, back, chest). Sunspots are found on sun-exposed areas (face, hands, arms). Melasma is typically on the face, particularly the cheeks, forehead, and upper lip.

Mental model

Visual explanation

Evidence

What the evidence shows

The appearance of hyperpigmentation - its shape, size, color, and location - can help identify the type and guide treatment.

  • Is it darker than surrounding skin?

    This is the primary characteristic of hyperpigmentation.

  • Is it flat or raised?

    Hyperpigmentation is usually flat.

  • Is it changing or asymmetrical?

    See a dermatologist for changing spots.

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

    PIHUsually relevant
    Fit signal
    Often useful

    Flat, dark spots

  • If your goal is

    SunspotsUse caution
    Fit signal
    Limited evidence

    Round, brown patches

  • If your goal is

    MelasmaUse caution
    Fit signal
    Limited evidence

    Larger, facial patches

  • If your goal is

    Key TipUse caution
    Fit signal
    Limited evidence

    See a dermatologist if unsure

Research notes already in this guide

  • Dermatologists use visual examination to identify hyperpigmentation.
  • They may use a Wood's lamp to assess pigmentation depth.
  • A skin biopsy may be needed to rule out other conditions.

Practical use

How to use it

  1. Examine your skin closely

    Look at the color, shape, and location of dark spots.

  2. Note any changes

    Track if spots are getting larger, darker, or changing shape.

  3. Consult a dermatologist

    If you're unsure about a spot, see a professional.

Safety

Side effects and cautions

  • Confusing hyperpigmentation with skin cancer

    Most hyperpigmentation is harmless, but see a dermatologist for any changing or suspicious spots.

  • Not recognizing PIH after acne

    Dark spots after acne are a common form of hyperpigmentation.

  • Assuming all dark spots are the same

    Different types of hyperpigmentation need different treatments.

Fit

Who should be careful

  • Those seeking a definitive diagnosis, which requires a dermatologist

Worth noting

Small details that can change the answer

  • PIH Appearance. Flat, dark spots in areas of past inflammation.
  • Sunspots. Round, brown patches on sun-exposed areas.
  • Melasma. Larger, darker patches on the face, often symmetrical.
  • Color Range. Hyperpigmentation can range from light brown to dark black.

Hyperpigmentation appears as dark patches, spots, or discoloration.

PIH looks like flat, dark spots in areas of past inflammation.

Sunspots are round, brown patches on sun-exposed areas.

Melasma appears as larger, darker patches on the face.

Different types of hyperpigmentation need different treatments.

Definition

Identifying different types of hyperpigmentation

Different types of hyperpigmentation have distinct visual characteristics. Recognizing these can help you identify the type and choose the right treatment approach.

  • PIH: Flat, dark spots in areas of past inflammation
  • Sunspots: Round, brown patches on sun-exposed areas
  • Melasma: Larger, darker patches on the face, often symmetrical
  • Freckles: Small, light brown spots that darken with sun exposure

Explanation

What to look for on different skin tones

Hyperpigmentation looks different on different skin tones. On lighter skin, it appears as darker brown spots. On darker skin, it appears as very dark brown or black spots, and the contrast can be more pronounced.

Benefits

Why recognizing hyperpigmentation matters

Recognizing hyperpigmentation is important for both treatment and skin health. It can help you choose the right treatments and distinguish it from other skin conditions, like skin cancer.

  • Helps you choose the right treatment
  • Allows you to distinguish it from skin cancer
  • Helps you track progress over time
  • Encourages you to seek professional advice when needed

Questions

Frequently asked questions

Can hyperpigmentation look like a mole?

It can, but moles are usually raised while hyperpigmentation is flat.

Does hyperpigmentation always look the same?

No, it can vary in color, size, and location.

Can hyperpigmentation appear suddenly?

It can, especially with hormonal changes or inflammation.

Is hyperpigmentation always dark?

It's darker than the surrounding skin but can range from light brown to black.

References

Sources

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

  1. Dermatologists use visual examination to identify hyperpigmentation.
  2. They may use a Wood's lamp to assess pigmentation depth.
  3. A skin biopsy may be needed to rule out other conditions.