Botulinum toxin is the main ingredient of face slimming injection, which is suitable for people with enlarged biting muscle, and the face slimming effect can be achieved after injection, usually the face slimming effect can be maintained for about 6 months after injection. In the clinic, it is often recommended that people with the need for face slimming should have a face slimming injection once every 3-4 months, and three times in a row, which can prolong the face slimming effect to about one to two years. The specific maintenance time of face slimming injection has a lot to do with the individual’s metabolism, the dosage of injection, the brand of injection, and daily life habits. After the injection, the effect cannot be seen immediately, generally 10 days after the operation, the effect will start to play a role gradually, and the effect will be the best after 2-3 months. Face slimming injection is generally used on both sides of the biting muscle, and the specific dosage needs to be injected under the diagnosis of the doctor. For people with asymmetry between the left and right sides of the cheeks, the injection dose can be adjusted appropriately to try to correct the asymmetry of the facial contour. In addition, water is strictly prohibited within 6 hours after the injection of face slimming needle, keep clean and dry. Avoid taking aspirin or other similar medications that activate blood circulation within one week after injection. Do not touch and press within 48 hours of injection, avoid large facial movements such as laughing and crying, and do not massage or care for the injection area within 1 week. Avoid chewing harder food for a short period of time after face slimming injection, which can effectively maintain the slimming effect.