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.

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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.

Treatments & Skin Concerns

Which Chemical Peel Is Best for Hyperpigmentation?

Chemical peels are one of the most effective in-office treatments for hyperpigmentation. But not all peels are equal - some are better for PIH, others for melasma, and the depth of the peel matters.

Quick answerThe best chemical peel for hyperpigmentation depends on the type of pigmentation and your skin type.

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

Chemical peel being applied for hyperpigmentation treatment
Best for PIHGlycolic acid, salicylic acid
Best for MelasmaTCA, Jessner's solution
Depth MattersSuperficial to deep
Key ConsiderationSkin type and Fitzpatrick scale
ImportantMust be done by a professional

Key answer

Effective with proper selection

Chemical peels can be highly effective for hyperpigmentation when matched to the type and applied by a professional.

Evidence
Moderate - Effective with proper selection
Best for
Those with stubborn hyperpigmentation; Those looking for faster results than topical treatments
Limitation
Those with very sensitive skin or active inflammation

See what the evidence shows

Short version

Story in brief

Chemical peels work by applying a solution that causes controlled exfoliation of the skin. This removes the outer layers, including pigmented cells, and stimulates the growth of new, healthier skin.

Different peels target different types of hyperpigmentation. Superficial peels like glycolic acid are good for mild PIH. Medium-depth peels like TCA are better for more stubborn pigmentation, including melasma.

The depth of the peel is a critical factor. Superficial peels affect only the epidermis, while medium-depth peels reach the papillary dermis. Deeper peels carry more risk and require more recovery time.

Mental model

Visual explanation

Evidence

What the evidence shows

Chemical peels are powerful tools for hyperpigmentation, but they must be matched to the type of pigmentation and the patient's skin type. The wrong peel can make pigmentation worse.

  • Do you have PIH from acne?

    A superficial glycolic or salicylic acid peel is a good start.

  • Do you have melasma?

    A medium-depth TCA or Jessner's peel may be more effective.

  • Do you have darker skin?

    Caution is needed to avoid PIH from the peel itself.

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 for PIHUsually relevant
    Fit signal
    Often useful

    Glycolic, salicylic acid

  • If your goal is

    Best for MelasmaUse caution
    Fit signal
    Limited evidence

    TCA, Jessner's

  • If your goal is

    ImportantUse caution
    Fit signal
    Limited evidence

    Professional application

  • If your goal is

    Key RiskDepends
    Fit signal
    Possible fit

    PIH in darker skin

Research notes already in this guide

  • Glycolic acid peels have been shown to improve PIH.
  • TCA peels are effective for melasma.
  • Combination peels often provide better results.

Practical use

How to use it

  1. Consult a dermatologist

    A professional can recommend the right peel for your skin.

  2. Pre-treat your skin

    Use a retinoid and sunscreen for 2-4 weeks before the peel.

  3. Follow post-peel care

    Use gentle products and sunscreen diligently during healing.

Safety

Side effects and cautions

  • Getting a chemical peel without proper skin preparation

    Use a retinoid and sunscreen for 2-4 weeks before a peel.

  • Choosing a peel that's too deep for your skin type

    Darker skin types need caution to avoid PIH.

  • Not following post-peel instructions

    Aftercare is critical for preventing complications.

Fit

Who should be careful

  • Those with very sensitive skin or active inflammation

Worth noting

Small details that can change the answer

  • Glycolic Acid. Superficial peel, good for PIH and sun damage.
  • Salicylic Acid. Superficial peel, good for PIH and acne-related pigmentation.
  • TCA. Medium-depth peel, effective for melasma and stubborn PIH.
  • Fitzpatrick Scale. Darker skin types (IV-VI) have higher risk of PIH from peels.

Chemical peels can be effective for hyperpigmentation.

The best peel depends on the type of pigmentation and your skin type.

Superficial peels are best for mild PIH, medium-depth peels for melasma.

Darker skin types need caution to avoid PIH from the peel itself.

Professional application and proper aftercare are essential.

Definition

Understanding chemical peels for hyperpigmentation

Chemical peels are classified by depth: superficial, medium-depth, and deep. Superficial peels affect the epidermis, medium-depth peels reach the papillary dermis, and deep peels reach the reticular dermis. Deeper peels are more effective but carry more risk.

  • Superficial: Glycolic acid, salicylic acid, mandelic acid
  • Medium-depth: TCA, Jessner's solution, combination peels
  • Deep: Phenol peels (rarely used for pigmentation)
  • Depth determines effectiveness and risk

Science

How chemical peels treat hyperpigmentation

Chemical peels work by removing pigmented cells from the skin's surface. This allows new, less pigmented cells to take their place. Some peels also stimulate collagen production, which improves overall skin texture and tone.

Exfoliation
The removal of dead skin cells from the skin's surface.
Fibroblast Stimulation
The promotion of collagen production by fibroblasts in the dermis.

Ingredient Comparison

Comparing chemical peels for hyperpigmentation

Glycolic Acid

goodBest for: Mild PIH, sun damage

Gentle · Good for all skin types

Salicylic Acid

goodBest for: PIH from acne, oily skin

Oil-soluble · Anti-inflammatory

TCA (Trichloroacetic Acid)

bestBest for: Melasma, stubborn PIH

Powerful · Effective for deep pigmentation

Limitations: Higher risk · Requires professional application

Jessner's Solution

goodBest for: Melasma, multiple types of pigmentation

Combination of acids · Effective

Questions

Frequently asked questions

Which chemical peel is best for PIH?

Glycolic acid and salicylic acid peels are effective for PIH.

Can chemical peels treat melasma?

Yes, TCA and Jessner's peels are often used for melasma.

Are chemical peels safe for darker skin types?

Yes, with proper precautions to avoid PIH from the peel.

How many chemical peels are needed for hyperpigmentation?

A series of 3-6 peels is often needed for best results.

References

Sources

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

  1. Glycolic acid peels have been shown to improve PIH.
  2. TCA peels are effective for melasma.
  3. Combination peels often provide better results.