When does Botox start to work?
One can start noticing the effect of Botox within a week and sometimes it may take up to 10 days to see the full results. The best results of Botox depends upon the total number of units injected and the underlying strength of muscles. The longevity of the results again depends upon the individual, and total dose received. There is no limit on how long one can keep getting Botox, however, injecting Botox to the forehead area after certain age group and in people with weak frontalis muscle can compromise their eyebrow shape and hooding can be enhanced.