Dynamic wrinkles, also known as power wrinkles, are formed due to the long-term contraction of facial expression muscles pulling the skin. The human face has many expression muscles, due to the contraction movement of different expression muscles, so that people appear joy, anger, sadness, happiness, sadness, fear, shock and other facial expressions. When the expression muscles contract, the muscle fibers shorten, pulling the skin to form the skin wrinkle line perpendicular to the direction of the long axis of the skin fibers, i.e. dynamic wrinkles. In addition with the age growth gradually, there can be corresponding parts of the surface skin dermal fracture, so that the dynamic wrinkles obvious and deepen, this situation will not usually disappear naturally, but will show dead folds. Botulinum toxin is a safer product, and side effects can be avoided by choosing a regular hospital. If you do not choose a regular hospital, facial asymmetry, aggravation of wrinkles, drooping eyelids and facial stiffness may occur when Botox is injected in the face; if it is used to remove neck lines, a few patients have allergic reactions with localized skin allergic masses, swelling and itching, and severe systemic allergy may lead to hypoxia, suffocation, dysphagia and other symptoms. After botulinum toxin injection, it can act on the peripheral nerve endings, i.e. synapse, resisting the release of neurotransmitter acetylcholine from the presynaptic membrane, thus blocking the nerve conduction to the muscle, causing muscle flaccid paralysis, and weakening the muscle tension to achieve the effect of wrinkle removal and beauty. Botulinum toxin injection is minimally invasive and highly effective, thus becoming an indispensable means of removing dynamic wrinkles.