How to get "angry" skin calmed after Vaseline allergy on neck and chest post fractional CO2 laser?

I recommend following up with your Doctor about after care. I recommend skin care with vitamin c, b5 hydrator, silicone based scar gels with growth factors and enzymatic washes with papaya enzyme. PDT therapy can help calm inflammation. Typically I recommend adding clear and brilliant, fraxel, viva 4-6 weeks after co2 to improve results along with microneedling/prp to get the best outcomes with texture and tone.  Please see an expert. Best, Dr. Emer

Inflammatory reactions post fractionated ablative laser, especially on the chest is not too uncommon, and is sometimes due to irritation from the moisturiser used, or an acne-type reaction due to the occlusive nature of these moisturisers.  A combination of a lighter moisturiser, oral antibiotics being used as antiinflammatories, and moderate strength steroid ointment usually settles things down.  Go back to your treating practitioner for a review and management.  Best wishes, Shobhan.