Neurotoxins are safe, effective aesthetic treatments, but like all elective treatments and procedures, there are potential side effects. Although side effects are rare, it’s important to be aware of the possibility of one or more occurring, which can include:
Injection site reactions
Headaches
Swelling, bruising, and redness
Droopy eyelids
Dry skin (when used to treat sweating)
Difficulty swallowing or breathing
Vision issues
Nerve or muscle problems