Should I Wait Until Botox is Completely Gone?

You needn't wait for four months to repeat your Botox treatment if yours is wearing off at 3 months. By treating it before it completely wears off, you have a better chance of improving the skin crease by relaxing the muscle contraction below before it has a chance of scrunching the skin again.

If you want to get the most permanence from your Botox treatment, it will help to get the next treatment before the motion comes back completely. Patients who treat with Botox this way find that the wrinkles come back less and less after each subsequent treatment.Eventually, you will require less botox to get the effects as the wrinkle causing muscles weaken over time from repeat botox treatments.

I would plan this around your schedule.  With Botox there is no specific answer for the timetable as it lasts differently for everyone.  If you are trying to plan your injections around an event then do so.  That is if you would like to have the maximum wrinkle reduction effects of the Botox for an event and you feel that the previous treatment has not entirely worn off (or maybe it has worn off in certain areas and not others) then plan to have Botox in those areas which have worn off before your event.