What can you expect after the procedure?

Botox injections require no downtime; you can resume your normal daily activities immediately. You may have headaches for a few hours after the treatment. Take care, though, not to rub or massage the treated areas. This can cause the toxin to migrate to a different area of your face. If this happens, temporary facial weakness or drooping is possible.

You’ll notice results within a few days, but the full effect takes about two weeks. Results aren’t permanent, however. Once the Botox has taken effect, it takes three to six months for the affected muscles to begin functioning again. So to maintain your look, you need follow-up injections every few months.

source: Mayoclinic