Many pregnant women experience headaches during pregnancy, and there are several causes of headaches in pregnant women: 1. If the headache is accompanied by dizziness, nausea and other symptoms, it may be a headache caused by abnormal blood pressure, anemia and other diseases during pregnancy. If a pregnant woman has been staying up late for a long time and has not had enough sleep, she should adjust her habits, rest on time, do not stay up late, and ensure sufficient sleep.