Fat-dissolving needle injects physiological saline, lidocaine, sodium bicarbonate and adrenaline into the fat layer according to a certain proportion, which can effectively promote the expansion and decomposition of stubborn fat layer and make fat more easily decomposed into fatty acids instead of supplying energy to the body. After liposuction needle injection, the effect usually begins to be seen in about two weeks, and then the effect will become more and more obvious, reaching the maximum effect after 3 ~ 4 months, and will remain this state for some time thereafter. Generally speaking, three injections of liposuction needles are a course of treatment, with an interval of 2-4 weeks each time, but it should be decided according to your actual situation, and it is best to consult a doctor first according to the current recovery situation.