1. The advantage of ultrasonic gun is that it is a non-invasive beauty method. By focusing the energy of ultrasonic wave, it can stimulate the regeneration of skin collagen and achieve the effect of firming skin. In addition, the ultrasonic cannon can also improve the problems such as skin relaxation and wrinkles, and make the skin smoother and more delicate.

2. Overinjection or improper injection of botulinum toxin can cause problems such as muscle stiffness and facial stiffness.