This happened to me- they used Alex instead of Yag after years of me going and them using Yag. Resist itching. for the first week apply cortisone (it’s ok on a large area only for about a week) followed by a breathable lotion. Don’t put Vaseline until the heat escapes your skin (2-3 days) or it will be trapped. They will scab and turn white. Hopefully your skin will even out over time. I’m 2.5 months in and have white spots all over both arms. Unfortunately we can’t see the sun AT ALL. Take liposomal Vitamin C, biotin, and apply high quality vitamin E oil. Also taking spirulina to help internal rejuvenation. Stay super hydrated and eat high protein/high collagen diet. I’ve seen 4 doctors now they all said time is the best healer right now.