Post 3rd session concern

hi guys ! i had my 3rd laser session last week and i had a few blisters that i was very careful with. they dried up after a few days and i have these very dark patches that remained in their place- today one of them started lifting and i decided to remove it because it was catching on my clothes; upon removing it carefully, it appeared that the ink under the little patch is completely gone ? is this something i should be worried about 😳