How long after botox can the botox migrate? Is 27 units enough to migrate? Where would botox migrate from the forehead?

Botox has a short window where it can migrate.  Experienced injectors are aware of how the product works and where and where not to inject.  The larger the injection dose, the greater chance of migration.  If the product migrates it does so right around the injection site.  Speak with an experienced injector to learn more.

Hello and thanks for your question. Migration of botox happens quite quickly if you rub the area for example. We would warn patients to leave the area alone for 24hours to be safe of any migration as it's unlikely after this point. Always go to a qualified and experienced practitioner for any injectable treatment, best wishes

There is a chance Botox can migrate in the first day or two after the procedure. The more Botox that is injected, the greater the risk for migration. However, experienced physicians with extensive training in Botox know how to mitigate the risk so it is extremely low. As long as you are working with a board-certified dermatologist with expertise in neuromodulators, you should not have any problems with your procedure.