Pre-operative precautions 1.No makeup should be applied to the injection site before surgery, but a small amount of moisturizer can be used; 2.Make sure that there is no inflammation at the injection site before surgery, such as folliculitis; 3.Take your own photos before surgery for post-operative comparison; 4.Be sure to inform the doctor whether you are preparing for pregnancy, pregnant or breastfeeding before surgery, as injection is not recommended during this period; Post-operative precautions 1.Avoid water on the injection site on the day of surgery, and avoid sleeping face down or squeezing the injection site on the first night after treatment Avoid sleeping face down or squeezing the injection site for the first night after treatment; 2. The time is generally around half a year (individual products reach one year); everyone reacts differently to hyaluronic acid, and in order to achieve the best effect, fine adjustment is needed, so the patient needs to be reviewed after 2 weeks to make a free assessment according to the patient’s reaction and provide a reference for the next injection to achieve the best effect. It is recommended to follow up again after 6 months to observe whether re-injection is needed.