You need correctors and a heavily pigmented concealer that matches the skin around your shoulder. Depending on the color tattoo, you want to use a corrector on top of it. Assuming you have a black tattoo, you want to use a peach color do neutralize the blueness and darkness of it. A corrector is basically a concealer that's the opposite color. You can find a lot of yellows, peaches, and greens. After that, pat your concealer on top. Don't rub or smear it or you'll disturb all the color correcting you've done. Then blend it out and use a powder puff to press translucent powder on top.
What's this for? It's a wig.
What's it for? To disguise yourself from yourself.