The symptoms of vomiting after slimming needle are caused by the side effects of drugs or the stimulation of gastrointestinal mucosa by drugs. The specific remission time will vary from person to person. Generally speaking, this kind of vomiting will be relieved within 2~3 days. During this period, we should maintain good living habits and avoid overwork and colds. At the same time, it is recommended to pay close attention to your physical condition. If vomiting persists or symptoms worsen, please seek medical attention in time.