Systemic reaction from laser tattoo removal. What caused this reaction?

I had a severe systemic reaction: hives along with swelling of upper lip after laser tattoo removal sessions. I have since stopped therapy and had to take steroids for a few months. What caused this reaction? I did not have a reaction to the initial placement of the tattoo. Is it possible to be allergic to the laser treatment itself? Am I ok to have another tattoo done since I reacted to the laser? Am I forever allergic to any kind of laser treatment or procedure and or tattoo placement