SEOLREIM · JOURNAL
Treating Post-Inflammatory Hyperpigmentation: How to Distinguish Acne Marks, Melasma, and Dark Spots
Full professional English translation completed and self-reviewed against the Korean source; numerical tokens and medical cautions preserved; separate medical review of this translation is pending. Translation updated: 2026-10-28.
Post-inflammatory hyperpigmentation (PIH) is a condition in which inflammation after acne, dermatitis, a wound, or a procedure increases melanin and leaves brown or gray-brown marks. Its treatment differs from that of red marks, melasma, and freckles. Rushing into laser treatment can cause irritation and further pigmentation, so current inflammation should be stabilized first and the sequence of sun protection, topical treatment, and procedures should be planned.
Differentiate by color and cause
| Condition | Main features | Treatment direction |
|---|---|---|
| Post-inflammatory hyperpigmentation | Brown or gray-brown marks after acne or wounds | Stabilize inflammation, protect from light, use topical agents, and select procedures as needed |
| Red acne marks | Red or purple, with vascular and inflammatory components | Control inflammation and assess vascular treatment |
| Melasma | Broad, irregular brown patches on both sides of the face | Long-term management centered on ultraviolet and visible-light protection and topical agents |
| Freckles and solar lentigines | Individual spots with relatively well-defined borders | Select IPL, laser, or another option after diagnosing the lesion |
Why it develops
When skin inflammation stimulates melanocytes, melanin can remain in the epidermis or the deeper dermis. It may remain visible longer in darker skin tones or when inflammation persists, sun exposure continues, or extraction and strong peels are repeated. If new acne continues to develop, treating only the existing marks is unlikely to be satisfying.
Potential benefits and limitations
Reducing new inflammation and using broad-spectrum sun protection, low-irritation skin care, and appropriate topical agents may allow marks to fade over several months. Dermal pigmentation and longstanding marks improve more slowly, and complete clearance cannot be guaranteed. Laser response also varies with skin tone, pigment depth, and sensitivity to irritation.
Who may be suitable and when to avoid treatment
Consultation is appropriate when brown marks persist after acne, dermatitis, or a wound has settled. Be sure to disclose active dermatitis, severe acne, recent tanning or sunburn, pregnancy or breastfeeding, photosensitizing medication, irritation from hydroquinone, retinoids, or acids, and a history of keloids. Asymmetric or rapidly changing pigmentation requires diagnosis before a cosmetic procedure.
Treatment process and expected recovery time
Current inflammation, color, depth, skin tone, and products in use are assessed first, then moisturizer, sun protection, and topical treatment are adjusted. Pico toning, laser toning, or IPL is selected according to the lesion and skin response. Redness and dryness may last several days, while superficial spots may develop fine crusting or temporary darkening for about 1–2 weeks. Forcibly removing flakes can cause new PIH.
Side effects, contraindications and warning signs
Topical agents can cause stinging, redness, and dermatitis. Laser and light treatments can cause burns, blisters, worsening melasma, post-inflammatory hyperpigmentation or hypopigmentation, and scarring. If pain and heat worsen or blisters, oozing, or patchy white spots develop, do not repeat the procedure and seek immediate medical care.
Differences among topical agents, pico toning, and IPL
| Method | Main role | Cautions |
|---|---|---|
| Sun protection and barrier care | Reduce new irritation and worsening pigmentation | Consistency is fundamental; this is the foundation of treatment rather than a substitute for procedures |
| Prescription lightening topicals | Regulate melanin production and turnover | Manage irritation, pregnancy contraindications, and duration of use |
| Pico toning and laser toning | Target pigment with the selected wavelength and mode | Settings by skin tone; beware of hypopigmentation with repeated treatment |
| IPL | Broad-spectrum light targets superficial pigmentation and vessels | Assess the possibility of worsening melasma and darker skin tones |
Medical Q&A
Q. Is laser the fastest treatment for acne marks?
A. If active acne and the skin barrier are not stabilized first, new marks and irritation may recur.
Q. Are red marks and brown marks treated with the same laser?
A. Diagnosis and device selection differ because the target may be blood vessels or melanin.
Q. Can I receive PIH laser treatment if I have melasma?
A. Melasma can worsen with heat and irritation, so the treatment area and intensity must be selected more cautiously.
References
We consulted the American Academy of Dermatology (AAD) guidance on marks after acne(https://www.aad.org/public/everyday-care/skin-care-secrets/routine/fade-dark-spots) and its guidance on melasma treatment and sun protection(https://www.aad.org/public/diseases/a-z/melasma-treatment). Laser settings and prescriptions vary with skin tone, lesion type, and Korean approval information.
SEOLREIM’s principles for diagnosing pigmentation
SEOLREIM Clinic distinguishes brown PIH, red marks, melasma, freckles, and dark spots instead of offering a generic whitening package. The doctor first checks active inflammation and the skin barrier, then directly consults on and performs the necessary sequence of pico toning, laser toning, IPL, and prescription management.
Information for international visitors
Visitors searching for PIH treatment Korea or pigmentation treatment Korea should disclose their natural skin tone, recent sun exposure, acne medication, and use of lightening agents or retinoids. Strong outdoor exposure after the procedure may need to be rescheduled. SEOLREIM Clinic is on the 11th floor of the Gangnam 8258 Building, about 1 minute from Exit 3 of Gangnam Station. International visitors should prepare their passport, allergy information, current medications, recent procedure records, and return schedule, and confirm available consultation languages and the scope of interpretation support before booking. Depending on the examination, same-day treatment may not be possible or follow-up after returning home may be needed.
Author, reviewer, publication date and update date
Written by: SEOLREIM Content Editor / Medical review of the Korean source: completed / Review confirmed: 2026-10-23 / Published: 2026-09-24 / Updated: 2026-10-27. This is general medical information and does not replace an individual diagnosis or prescribed treatment.
SEOLREIM · GANGNAM, SEOUL
Discuss Skin Treatments in Seoul with Seolreim Clinic.
Seolreim Clinic provides doctor-led consultation and treatment, following its principles of genuine products, accurate quantities and attentive care.
Tell us your treatment interests, skin concerns, dates in Korea and preferred consultation language. Confirm treatment suitability, recovery plans and language support before booking.