Slimming with one needle is an injection beauty method for abdominal fat sculpture, which destroys fat cells by injecting drugs, decomposes them and is gradually absorbed by the body, thus achieving the effect of slimming. In the choice of injection site, it is generally recommended to carry out around the navel. Generally speaking, the fat distribution on the left and right sides of the navel may be different, but which side to inject depends on the doctor's judgment and the patient's wishes.