What causes pregnant women to vomit bleeding?

The common causes of vomiting and bleeding in pregnant women are as follows: the first is mainly due to severe contraction of stomach muscle tissue caused by severe vomiting, resulting in rupture of capillaries in the gastric mucosa, resulting in bleeding. The second may be due to severe vomiting caused by rupture of capillaries in the lower esophageal mucosa. The third may be due to severe vomiting caused by rupture of capillaries in the oropharyngeal mucosa. Vomiting bleeding volume is not much can be observed, but if the amount of bleeding is huge, need to go to the hospital as soon as possible to stop bleeding treatment.