What causes palmar erythema?

Sorry to hear that you are troubled with post acne red marks. Laser is indeed the best way of removing these marks. We usually use the pulsed dye laser (VBEAM) as it is excellent in shutting down the blood vessels and resulting in fading even after 1-3 sessions. In terms of topicals, we usually advise patients to practice strict sun protection and apply sunscreen daily as well as to reduce sun exposure as much as possible. As long as there are no new active acne forming, these marks will usually fade gradually over time. Hope this helps!

PIE from previous acne can be treated by a wide range of lasers. This very recent review paper (Light-based devices in the treatment of cutaneous vascularlesions: An updated review) shows a compilation of more than 50 clinical papers of the options to treat vascular skin lesions. I shall summarize their findings below. Long pulse visible light options like KTP (green) or CB/PDL (yellow) are extremely useful, with the yellow light options having most affinity to "redness" and more suitable for darker Asian skin types - still the GOLD STANDARD for treatment.