How long do you have to wait to shower after tanning?

Depends on if you used a lotion or not. Most lotions have DHS in it, which is like a tinted moisturizer. If you used a lotion you should wait 4 hours so the DHS has had time to completely soak into your skin, after the 4 hour wait you can shower. If you didn't use a lotion you can shower whenever you feel like it.