Typically, the effect of BOTOX® Cosmetic is visible within 4-5 days. After the injection, patients may experience slight bruising around the area that quickly fades. For the first 4-6 hours after the treatment, we recommend no constant pressure over the injection site or lying down. It is also recommended to delay vigorous activity until the following day. Possible side effects are temporary weakness of nearby muscles or in rare cases a slight drooping of the lid. BOTOX® Cosmetic is completely reversible so any side effect is only a temporary condition. The doctor will explain all risks associated at the time of your consultation.