Why your pigment came back darker

Almost every week someone sits down and tells us the same story: a course of pigment treatment somewhere else, a dramatic improvement in the first month, and then a return that left them worse off than when they started. It is such a consistent story that it is worth explaining the mechanism, because once you understand it you can ask the right question before you book anything.

Pigment-producing cells respond to injury by producing pigment. That is their job. Ultraviolet light is the injury we all know about, but heat is an injury too, and so is inflammation. A treatment that shatters pigment by heating it is therefore doing two contradictory things at once: removing the pigment that is there, and instructing the cells to make more.

In skin that is not particularly reactive, the first effect wins and the result holds. In melasma-prone skin — which is common in Korean, Chinese, Southeast Asian and Mediterranean skin types — the second effect frequently wins, and it wins on a delay of four to eight weeks. That delay is why the rebound feels like a betrayal: by the time it appears, the course is finished and paid for.

The way around it is not a better machine, it is a different mechanism and a slower schedule. Ultra-short pulses break pigment mechanically before heat has time to spread. Lower energies across more sessions keep the total inflammatory load beneath the threshold that provokes a response. Neither is exciting to sell, which is part of why they are undersold.

There is also the part that has nothing to do with the clinic. Daily broad-spectrum sunscreen, reapplied around midday, is not an add-on to a pigment course; it is half of it. We have seen beautifully executed courses undone in a fortnight by a week of unprotected daylight, and we have seen mediocre courses hold for years because the patient was rigorous.

So the question to ask before you book is simply this: what is the mechanism, what energy are you using, and how many sessions do you expect this to take? A clinic that answers "low energy, and probably eight" is telling you the truth. A clinic that promises clearance in two is telling you what you want to hear.