BOTOX therapy from a trained professional is safe and effective, even for long-term use. According to studies, prolonged use does not increase the chances of side effects.
On the whole, side effects from using BOTOX are uncommon. When they do occur, they usually involve itching, bruising, swelling, or redness at the injection site. These symptoms typically clear up within a few days. In very rare cases, such as an unknown allergy to BOTOX, more serious side effects can occur. Contact your doctor immediately if you have a reaction.