Yes, ibuprofen causes blood thinning and more bleeding. I wouldn't take it. The tat shouldn't really hurt too much after. You should be fine. I think it's more of a burning turning to itching after, but it's much duller than while getting it. I didn't go numb at all during any of mine... My last one (and biggest by far) went generally very well, except for the second session where it was filling in and shading on my hip bone and ribcage on my side. Yeah, by the end of that session I was sweating.