Botox has been shown to be relatively safe. Like any procedure, however, there’s some amount of risk. Though they’re rare, there have been complications reported in a small percentage of cases. Most side effects are temporary and go away on their own. The most common reported side effects are: Headache Eyelid ptosis (drooping eyelid) Eyelid edema (swollen eyelid) Brow ptosis (drooping brow) Make sure you tell your provider about any health conditions and medications during your pre procedure consultation.