我最近看过一本书叫《pregnancy for dummies》里面有提到孕妇流鼻血，原文是：Because of the higher volume of blood coursing through your body to support your pregnancy, you may experience some bleeding from small blood vessels in your nose and gums. This bleeding usually stops by itself, but if bleeding becomes particularly heavy or frequent, call your doctor. 意思大概是说由于怀孕，身体需要大量血流支持，从而导致鼻子和牙龈微细血管出血，是正常现象，会自动止血的，但如果持续严重出血，就要看医生了。
