so I have two pieces of art that I love dearly out of the 17 pieces I have, that in the summer months are raising and becoming extremely itchy? these two tattoos in question are 4 years old and completely healed. but the itching is unbearable. does anyone have any insight as to why they are doing this and not my other pieces? all of my work was done by the same artist but he has passed away so I can't ask him. are there any remedies?

these are the two pieces in question. I also am getting little bumps on the pieces. it's only the black ink as well thanks in advance 😘