There are many reasons for headaches in pregnant women, such as overwork or overstress, and only when the causes are identified can the treatment be targeted. If you do not pay attention to rest during pregnancy, it may be due to strain that may cause headaches; some women are too nervous during pregnancy, worrying about the development of the baby every day, not having good sleep quality, thinking all day long, which will certainly lead to headaches in the long run. Women who are anemic or have blood deficiency may have headaches during pregnancy, for which they should take dietary supplements or medication to replenish their blood in time. In addition, blood pressure tends to rise after pregnancy, so it is important to monitor the changes in blood pressure during pregnancy, and if it is accompanied by hypertension, give oral antihypertensive drugs to control blood pressure if necessary, and pay attention to a low-salt and low-fat diet. In conclusion, the first thing to rule out is whether the headache is accompanied by high blood pressure, because high blood pressure during pregnancy, especially in the second trimester, can easily induce eclampsia, which is very unfavorable to both the pregnant woman and the fetus, and also to rule out the presence of anemia, because it is easy to become anemic during pregnancy, and overexertion, lack of rest or excessive stress may lead to headaches.