I was told numbing cream could not be applied because it would create a barrier and the ink wouldn't take. Is that true?

Great question!  As long as you are not having an active outbreak, in the area to be treated, at the time of treatment and subsequent touch-up, you should be fine.  An active outbreak in places other than the area to be microblade does not necessarily rule out treatment...

Hello milanfc10101010, There should be no need to worry as long as the procedures are performed by an experienced licensed professional in a sterile setting, preferably with a physician available on site and that you follow all post care instructions.  Best to you,

You need to speak with your acne doctor about the safety of doing microblading in your exact sitation. It always pays to be safe