How might the heavy metals used in inks become a health concern when trying to
remove tattoos using lasers?

Some tattoo pigments containing metals could theoretically break down into toxic chemicals in the body when exposed to light. This has not yet been reported in vivo but has been shown in laboratory tests. It has also been shown that carcinogenic amines are generated by a laser-induced cleavage of azo dyes.

Imma gonna say go with the very first answer (:

Wat r u trying to