I'm currently having a large tribal tattoo removed I've had 5 sessions so far (split design into 3, so 2 sections have now had 2 sessions) The area which received it's second session last night has blistered. Lots. Really big blisters... Is this normal? The first session didn't really blister - i mean, it did, but not to this extent. These are around the size of cashew nut blisters! Will this happen every session?