Before we proceed, we want to emphasise that no one should feel the need to conceal their tattoos. Some people are against neck pieces and tattoos in general, but this art form is now widely accepted to express who we are as individuals.
However, because tattoos are personal, many people prefer to conceal their ink. One of the advantages of back-of-the-neck tattoos is that they can be easily concealed by wearing your hair down.
If you don't have long hair, your options are limited depending on the size and exact location, but if you want to keep it hidden, you can always find a workaround.