You can actually not cause any damage during HydraFacial procedure if licensed and approved equipment is used by trained aesthetician. It is possible to miss few spots or do a poor job, but that is typically seen on untrained new professionals or people that try to self-perform HydraFacial at home with friends instead of going to medical spa.

During first 24-28 hours after treatment it is possible to cause harm to skin, because it is most sensitive right after procedure and it takes up to 2 days to fully recover.