The effect time varies from person to person due to different injection sites and individual sensitivity. Usually, for facial injections, the results can be seen in about 1 week. Lipolysis injections are mainly used to dissolve fat and the main ingredients include lecithin and sodium deoxycholate. The specific effect time of lipolysis injections is related to the patient’s body type, physical condition, the number of injections and the injection site. At present, clinically, lipolysis injections are mainly used to dissolve facial fat, for side face or double chin, and are not suitable for extensive lipolysis, which usually takes effect about 1 week after injection. Most women may have obvious results after one injection, but some women need several injections before they can have more obvious results. In addition, lipolysis injections in the lower legs take a little longer to work, while lipolysis injections in the abdomen and shoulders take a little less time to work. In addition, there are many complications after lipolysis injections, such as infection and pus, tissue necrosis, and in serious cases, fat embolism, which can be fatal, so it is recommended to go to a regular hospital for injections.