What is the difference between PIH, melasma and age spots?

Post-inflammatory hyperpigmentation (PIH) is dark discolouration left behind after a skin injury or inflammation — most commonly after acne, but also cuts, eczema or other skin trauma. Melasma is a chronic skin condition causing patches of darker pigmentation, strongly associated with hormonal factors (pregnancy, hormonal contraceptives) and UV exposure — it requires dermatologist management. Age spots (also called sun spots or liver spots) are flat dark spots caused by cumulative UV exposure over years, most common on the face, hands and chest. These have different causes and, in the case of melasma, require professional treatment rather than just OTC skincare.

Does SPF really make that much difference for dark spots?

Yes — it makes an enormous difference. UV exposure stimulates melanin production, and without SPF, existing dark spots are made darker and new ones form more easily. Any brightening serum or treatment you use is working against the effects of ongoing UV exposure if you are not wearing SPF. Dermatologists consistently emphasise that daily broad-spectrum SPF is the single most important step in any hyperpigmentation management routine. Without it, progress from brightening ingredients is significantly slowed or negated.

Which Korean skincare ingredients help with dark spots?

Several ingredients have evidence for supporting a more even skin tone over time. Niacinamide (5%) may reduce the transfer of melanin to skin cells. Vitamin C (L-ascorbic acid and its derivatives) is an antioxidant associated with brightening. Azelaic acid is well-regarded for supporting more even tone, particularly for PIH. Alpha-arbutin is a gentler form of arbutin that may inhibit melanin production. Tranexamic acid is gaining recognition for its brightening properties. Rice extract contains ferulic acid and compounds with mild brightening activity. Results from all of these require consistent use over weeks to months alongside daily SPF.

How long does it take for dark spots to fade?

It depends on the type and depth of pigmentation. Superficial PIH from mild acne may fade noticeably within 4–12 weeks of a consistent routine with brightening ingredients and daily SPF. Deeper PIH, sun damage spots or melasma take significantly longer — months of consistent treatment — and melasma in particular often requires professional management to achieve meaningful improvement. Consistency, patience and daily SPF are the three most important variables.

When should I see a dermatologist about dark spots?

Consult a dermatologist if: you have melasma (which often requires prescription treatments or professional procedures); dark spots appear suddenly or change in shape, size or colour (which should always be evaluated medically); spots have not responded to a consistent OTC routine after 3-6 months; the pigmentation is severe or widespread; or the pigmentation is accompanied by other skin changes. A dermatologist can diagnose the type of pigmentation and recommend treatments including prescription-strength topicals, chemical peels or laser therapy if appropriate.

Skin Concern Guide

Dark Spots & Hyperpigmentation

Hyperpigmentation — areas of skin that appear darker than the surrounding tone — is one of the most common skincare concerns globally. In Korean beauty, brightening ingredients and sun protection are foundational elements of many routines, and this is directly connected to the importance of managing melanin production and protecting existing skin tone.

This guide covers the types of hyperpigmentation, which Korean skincare ingredients may support a more even tone over time, the non-negotiable role of SPF, and when professional guidance is needed.

General Information Only. This page provides educational skincare information and is not medical advice. If you have persistent acne, eczema, rosacea, allergies, skin irritation, pigmentation changes or any medical skin condition, please consult a qualified dermatologist or healthcare professional before changing your skincare routine. Individual results vary. Always patch test new products.

Melasma requires dermatologist care

Melasma is a chronic skin condition often associated with hormonal factors and UV exposure. It can look similar to other forms of hyperpigmentation but typically requires prescription treatments and/or professional procedures to manage effectively. If you suspect melasma, please consult a dermatologist rather than relying on OTC skincare alone.

Types of hyperpigmentation

Post-inflammatory hyperpigmentation (PIH)

Brown or dark marks left after skin inflammation — most commonly from acne, but also from eczema, cuts or other skin trauma. More common and more persistent in deeper skin tones. Responds to brightening ingredients and SPF over time.

Post-inflammatory erythema (PIE)

Pink or red marks (not brown) left after blemishes — caused by dilated blood vessels rather than melanin. Different in mechanism from PIH and responds differently. Centella asiatica, ceramides and time are the main approaches; dedicated brightening ingredients for PIH are less relevant here.

Sun spots / age spots

Flat, well-defined dark spots from cumulative UV exposure over years. Common on the face, hands and chest. Respond slowly to brightening ingredients; SPF is essential to prevent new formation.

Melasma

Chronic patches of deeper, often symmetrical pigmentation linked to hormonal factors (pregnancy, contraceptives) and UV exposure. Requires dermatologist management — OTC skincare alone is typically insufficient.

The role of SPF — non-negotiable

UV exposure triggers melanin production and makes existing dark spots darker. Any brightening ingredient you apply in the morning is partially undermined if you step outside without SPF. Daily broad-spectrum SPF 30–50 is not optional in a hyperpigmentation routine — it is the foundation.

Korean sunscreens are widely praised for their lightweight textures, which makes them easier to wear consistently — and consistency is exactly what matters here.

Ingredients to consider

Niacinamide (5%)

May reduce melanin transfer to skin cells — a well-studied mechanism for supporting more even tone over time.

Vitamin C

An antioxidant that may support brightening and protect against UV-related melanin stimulation. Use in the morning under SPF.

Azelaic acid

Well-regarded for both blemish-prone skin and hyperpigmentation — often recommended as a gentler option for sensitive skin.

Alpha-arbutin

A stable, gentler brightening ingredient that may inhibit melanin-producing enzyme activity.

Tranexamic acid

A newer brightening ingredient gaining recognition in K-beauty for its tone-evening properties.

Rice extract

Contains ferulic acid and compounds with mild brightening activity — a traditional K-beauty ingredient.

A brightening routine example

Morning

Gentle cleanser → vitamin C serum → hydrating toner or essence → lightweight moisturiser → SPF 30–50 (essential).

Evening

Double cleanse → niacinamide or azelaic acid toner → serum (niacinamide or tranexamic acid) → moisturiser with ceramides.

1-2x/week (evening)

A gentle AHA (lactic acid) exfoliant after cleansing to support cell turnover — improves absorption of brightening ingredients.

Timeline expectations

Mild PIH from recent blemishes may show visible improvement in 4–8 weeks of consistent treatment and daily SPF. Older or deeper spots, sun damage and melasma take considerably longer. Some improvements may take 3–6 months of consistent use. Results depend heavily on SPF adherence, skin tone, the age and depth of pigmentation, and consistency of routine.

Managing expectations is important: gradual, steady improvement over months is a realistic outcome. Dramatic overnight changes are not.

When to see a dermatologist

See a dermatologist if you suspect melasma; if spots appear suddenly or change in character; if spots have not improved after 3–6 months of consistent routine and SPF; or if you want to explore prescription-strength treatments, chemical peels or laser options. A dermatologist can also rule out any spots that need medical evaluation.