Burning and blackening in my anus area after laser treatment

I went for laser treatment, but two days later I felt a pain on the back of my neck and as far as I could see, there were burns, but what I didn’t understand was the formation of blackened spots, I didn’t have them.What do you think could happen?
I uploaded some pics

if infected, use betadine.
In general, apply wound/hydro gel, then cover each cheek with silicone sheet

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Thank you very much, I was afraid it would be permanent

no it won’t but hypo can last around 2-4 yrs, but your skin will heal and look normal 100%
But u must take care that it’s only just epidermis injury & contain within this layer only.

injury involves both epidermis + deeper dermis => can lead to permanent scarring