A month. According to the inquiry of 39 Health Network, the course of treatment of slimming needle needs to last for one month. This is because the slimming needle needs to gradually adjust the body's metabolic state and fat burning speed, so that the body can gradually adapt to it and achieve the ideal weight loss effect. In the early stage after the start of slimming acupuncture treatment, the body needs some time to adapt to the new metabolic state and appetite control effect. At the same time, the effect of slimming needle also needs a period of accumulation, gradually reducing the accumulation of weight and fat. So it takes a month of treatment to see the obvious slimming effect and lose weight.