Vomiting after IUD removal may be caused by sympathetic nerve excitation, stimulation of vagus nerve, effect of anesthesia, gastrointestinal discomfort and other reasons. 1. Sympathetic nerve excitation: When a woman is having an IUD removed, she will be overly nervous, which will cause sympathetic nerve excitation, and she may vomit after the removal of the IUD. 2. Stimulation of the vagus nerve: women need to dilate the cervix when removing the IUD. Dilating the cervix too quickly and with too much force will reflexively stimulate the vagus nerve, which will also cause vomiting after removing the IUD. 3. The influence of anesthesia: women who are afraid of pain choose painless IUD extraction, the injection of anesthesia drugs into the bloodstream, stimulating the vomiting center in the medulla oblongata, which may cause vomiting symptoms after IUD extraction. 4. Gastrointestinal discomfort: Vomiting after IUD removal has nothing to do with IUD removal, but with gastrointestinal discomfort, such as gastritis, gastric ulcer patients, stomach irritation causing reflex vomiting. There are many reasons for vomiting after removing the IUD, and it is recommended to consult a doctor in time if it is serious.