Thank you for your question Botox relaxes the muscles that are causing your wrinkles, and once the effect wears off, your muscles will return to their normal functionality and the wrinkles will assume their pre-treatment appearance. There are no harmful effects if you stop Botox treatment, but as your muscles will no longer be relaxed, lines or wrinkles will gradually return. The longer you had Botox consistently injected, the longer it should take for the wrinkles to return. However, remember that Botox does not stop aging, so the older you are, the more wrinkles you will naturally develop. You can always go back to Botox later though if you choose to. Best of luck!