Your tattoo will begin to flake or peel quite naturally a few days after you get it. At first, the area will be covered with an area of dry skin that looks like a dry film. This is dead skin that will eventually peel and flake away. Some of the dry flakes may contain ink from your tattoo, but it's also natural for you to lose some ink this way.
You should be using lotion on the tattoo to keep it moisturized, and that will help with any itching or excessive peeling.
Again, DON'T scratch the tattoo! This can lead to damage!
For more information on tattoo care, see the other FAQs on 'How To Take Care of Your New Tattoo.'