I have had the same reaction to blues in a few of my tats. They look as though they're blistering...and I'm talking YEARS after getting the tattoo...it goes away...usually only happens once...I think it was the ink itself that i had a reaction too...I do recall it happening with some pink shading of one teeny bit of another tattoo...

I read, during researching this, that the metals in the dyes might be to blame. There is some blistering if I don't leave it alone. Any tattoo artists have ideas to ensure this won't happen again, know brands of ink that this doesn't happen with? help...

This also occurs as a histamine reaction. I have that problem with the teal in my tattoos. I do not have metal allergies but I do get heat rashes and it might be a reaction to foods that I have consumed at the same time. Usually only lasts for a short while but there is not blistering that occurs just it raising.

I understand this is fairly common with reds and blues that reactions can occur. Black cherry did not do well on me in some areas but in others it is a beautiful color, so it might depend on where on the body the ink is. The teal I have is universal in its raising, but it doesn't do it all at the same time, just areas might raise or a specific tattoo and not another.

Just a person's body chemistry at that moment in time maybe too. :)

So, just be aware and make sure the tattoo artist is knowledgeable about their inks. :)