Chin injections of hyaluronic acid generally maintain the effect for six months to a year, with the exact duration of maintenance related to the patient’s own physical condition as well as post-operative care and other factors. Chin injection of hyaluronic acid is injected into the jaw to support the depressed area by increasing the volume of subcutaneous tissues, thus making the chin line more delicate and straight. The results of hyaluronic acid injections in the chin usually last about six months to a year. After injection, hyaluronic acid is gradually metabolized and degraded in the body, so the effect lasts for a shorter period of time. Twenty-four hours after the injection of hyaluronic acid, you should avoid contacting the eye of the needle with water, no make-up, no swimming, no sauna, to avoid infection and other situations. Pay attention to sun protection within seven days after injecting hyaluronic acid. Avoid kneading the injection site directly after hyaluronic acid injection, to prevent soft tissue damage caused by infection. Within seven days after the operation, you should try to avoid eating stimulating food to prevent allergic reactions. If you have a high demand for molding effect, you can fill it again according to your personal needs. Hyaluronic acid can be filled for two or more times before the postoperative effect can be realized and maintained for more than one year. Incomplete absorption may be related to the formation of local envelope. Repeat the treatment every six months to one year. It is recommended that candidates choose professional and formal medical beauty institutions for injection, and follow the doctor’s instructions for good care.