Severe vomiting can be treated in the emergency room. Pregnant women with severe, unexplained vomiting can go to the emergency department, where an ER doctor will determine their condition and give them the next step in treatment. Pregnant women are usually prone to vomiting in the first 3 months of pregnancy, and after 3 months the vomiting may subside or disappear. When vomiting is severe, it is important to go to the hospital to have blood and electrolyte tests done and to have fluids (e.g., amino acids, vitamin B1, etc.) given. Most of the doctors in the emergency department, when they see a pregnant woman with vomiting, will rule out pancreatitis, cerebrovascular disease and other diseases, and if they are sure that the vomiting is caused by pregnancy, they will ask the obstetricians and gynecologists to assist in the diagnosis and treatment, or will transfer to the obstetrics and gynecology department for specialized treatment. If a pregnant woman is vomiting severely and there is no obstetrics and gynecology clinic in the evening, she can go to the emergency department; if there is an obstetrics and gynecology clinic in the daytime, it is recommended to give priority to the obstetrics and gynecology clinic, so as not to affect the resources of the emergency department. Seek timely medical attention for any discomfort during pregnancy.