Whether vomiting and bleeding is dangerous for pregnant women needs to be judged based on the amount of bleeding and other symptoms, and cannot be generalized. During the first trimester, pregnancy reactions may occur, resulting in nausea, vomiting, loss of appetite, anorexia, drowsiness, as well as body aches and weakness, which are normal physiological manifestations. However, in case of severe pregnancy vomiting, it is easy to rupture the capillaries in the esophagus and cause bleeding. If the amount of bleeding is small, you should not be too nervous and it is usually not dangerous. And if it is accompanied by bright red blood, it may be caused by bleeding from the gastric mucosa, which is dangerous. In addition, frequent vomiting may cause disorders of water and electrolytes in the body of pregnant women, as well as affect the intake of nutrients. Severe malnutrition may also cause miscarriage, premature birth, malformation, intrauterine growth retardation, and may even lead to fetal death. Therefore, it is recommended that pregnant women should seek medical advice from a hospital in a timely manner and make appropriate treatment.