Post-acne dark marks are a specific problem with a specific mechanism: after a pimple resolves, inflammation leaves excess melanin in the epidermis and sometimes the upper dermis — dermatology calls it post-inflammatory hyperpigmentation (PIH). It is not scarring. The surface is flat, the texture is normal, and the discoloration is brown to grey-brown. This distinction is the single most important fact in post-acne dark marks treatment, because the three things acne leaves behind — brown marks, red marks and pitted scars — each need a different tool, and treating one with the recipe for another wastes months.
Brown marks respond to pigment-directed care. The clinic's working platform is a picosecond 1064 nm laser run at low fluence — the wavelength a 2023 meta-analysis identified as effective and safe for pigment work in darker skin types, and the setting a 47-subject Korean study showed lowers measured melanin index over a 12-week course. Sessions are spaced 2-4 weeks apart, take 10-15 minutes of laser time, and leave no social downtime. Red marks — post-inflammatory erythema, the pink-red shadows on fairer skin — are vascular rather than pigmented and are handled with a 595 nm vascular laser instead. Depressed or pitted texture belongs to acne scar treatment, a collagen problem with its own protocols.
At Kind Global Clinic Myeongdong, every post-acne dark marks treatment plan starts with a co-director examination under magnification: which lesions are pigment, which are vascular, which are textural, and whether active acne is still seeding new marks — because lasering dark marks while breakouts continue is a treadmill. Active lesions are stabilized first, through acne treatment where needed, then the pigment course runs on a travel-friendly 2-4 week cadence with strict SPF as the non-negotiable companion. Asian and darker Fitzpatrick skin both marks more readily and rebounds more readily when over-treated, which is why gentle settings and honest pacing beat aggressive single sessions for this condition.