How effective is picosecond laser treatment for post-inflammatory hyperpigmentation?

Post-inflammatory hyperpigmentation is excess colour left after acne, eczema, injury, a procedure, or another irritation. A laser can target pigment, yet new marks may appear if acne or inflammation continues. Pigment closer to the surface may respond differently from pigment deeper in the skin. Temporary redness, irritation, darker colour, lighter colour, or a delayed response are possible, with risk influenced by skin tone and treatment intensity.

First identify and treat the trigger with a clinician. Discuss sun protection, gentle skincare, and whether a topical pigment treatment should be tried before or alongside a laser. Do not pick active spots or apply irritating products around a treatment area. A clinician may recommend a test spot and spaced sessions, then review the colour over time rather than judging the result while the skin is still inflamed.

Ask for prompt review if treated skin develops severe pain, blistering, open sores, spreading redness, pus, or swelling that is worsening. Seek advice if a mark changes in shape, bleeds, or does not fit the history of a healed injury or rash. A new rash or active inflammation should be assessed before further pigment treatment.

What caused my marks, and is that trigger controlled? Is the pigment superficial or deeper? Would topical care be a better first step? How will my skin tone affect settings and aftercare? When should we reassess before considering another session?