After the face slimming injection will not work immediately, usually in 2-4 weeks after the injection to see the effect. The main component of the face slimming injection is A-type botulinum toxin, is by blocking the nerve to muscle nourishment, so that muscle tissue disuse atrophy, so after the injection in the facial bite muscle, can make people visually achieve the effect of a thin face. Generally 2-4 weeks after the injection will gradually take effect, and just after the injection of the thinning needle within 2-3 days, the patient’s face may appear swollen symptoms, mainly due to the injection of drugs have not been completely absorbed, usually wait until 2 weeks after the role of the face will slowly thin down. The time cycle of its metabolism in the body is generally 4-6 months, the role of thinning the face can be maintained for more than 6-8 months. After the face slimming injection, patients need to pay attention to the first 2 days to avoid massaging the face, do not ice to reduce swelling, daily should quit smoking and alcohol.