Risks Of Botulinum Toxin Injection
Adverse effects of botulinum toxin injections are more frequently observed in therapeutic uses for medical concerns rather than cosmetic purposes due to the higher dosing required.
When they occur in a dermatologic procedure, side effects can be mild to moderate but are usually self-limited. Complications can include:
Symptoms due to the use of anesthesia
Bruising, edema, or pain at the injection site can develop due to the injection of anesthesia.
Blepharoptosis (low-lying upper eyelid margin ) and eyebrow ptosis (descent of the eyebrow from its natural position) can occur and last for three months when botulinum toxin is injected near the eyes.
Though rare, some can have allergic reactions to the toxin.
Headaches and flu-like symptoms are sometimes reported.
Problems with smiling
A crooked smile can be a temporary side effect and can also cause drooling.