How effective is pulsed dye laser treatment for post-inflammatory erythema?

Post-inflammatory erythema is redness that remains after inflammation such as acne, irritation or an injury has settled. It differs from brown or grey post-inflammatory pigmentation, which needs a different discussion. A clinician can check that the redness is the correct target before treatment.

Laser can reduce the visible vascular component, but it does not stop new acne, eczema or irritation from creating fresh marks. Skin tone, the age and depth of the mark, active inflammation and the chosen settings all influence the result.

Wait until the underlying flare is controlled unless your dermatologist advises otherwise. Tell the clinic about recent tanning, medicines that increase light sensitivity, a history of cold sores and any tendency toward prolonged colour change after skin injury.

Use gentle products around the appointment and follow the aftercare plan. Temporary redness, swelling, pinpoint crusting or colour change can occur. Daily broad-spectrum sun protection helps reduce further contrast between the mark and nearby skin.

Seek advice if the area becomes increasingly painful, warm, blistered, crusted or draining, or if redness spreads. A new rash or a mark that changes despite treatment should be reviewed rather than assumed to be post-inflammatory erythema.

Are these marks erythema rather than pigmentation or active inflammation? Should my acne or other trigger be treated first? What aftercare will reduce irritation, and how will you assess improvement without confusing temporary redness with the original mark?