Usually after 3-4 consecutive injections of face slimming injection, the muscles can be locally disused atrophy due to long periods of non-exercise, i.e. permanent shaping. However, if the patient does not take proper care of the bite muscle, often exercise the bite muscle by getting high, chewing hard objects, chewing gum, etc., there may be a rebound. Face slimming injections, i.e. Botox, by blocking the transmission of neurotransmitters to the surface of the bite muscle, the bite muscle is deprived of stimulation for a long time and gradually atrophies. However, the effect of Botox is maintained in about half a year, the effect will disappear after half a year, so in 5-6 months, need another injection of Botox, usually 3-4 injections, when the bite muscle and chewing habits change, it is not necessary to inject again, can achieve a permanent shape. In addition, the injection of facial slimming need to pay attention to avoid menstruation, a short time after the injection area should avoid pressure rubbing, 1 week no smoking and drinking alcohol, avoid excessive spicy, stimulating food and food that can cause allergies.