What causes sudden dizziness in pregnant women?

Sometimes, if we stay up too late at night, we may feel dizzy during the day. In fact, many diseases can also cause symptoms of dizziness. However, dizziness often occurs in pregnant women. So, what is the matter with pregnant women suddenly feeling dizzy? Let me give you a detailed introduction below, I hope you can understand it.

Because pregnancy causes varying degrees of physiological changes throughout the body of pregnant women, if the body cannot adapt, a variety of symptoms will appear, dizziness is one of them.

If it occurs in early pregnancy, there are usually no adverse consequences. It may be caused by the following factors:

1. After pregnancy, the pregnant woman's autonomic nervous system is disordered and the motor nerves that regulate blood vessels are unstable. When the body position changes suddenly, dizziness may occur due to transient cerebral ischemia.

2. Due to pregnancy, blood volume increases to adapt to the growing needs of the fetus. At this time, the pregnant woman's blood circulation volume can increase by 20% to 30%, including a 40% increase in plasma and a 20% increase in red blood cells. The blood is diluted accordingly to form physiological anemia, causing the pregnant woman to feel dizzy or blurred vision when standing.

3. In the second trimester of pregnancy, due to the short circuit between the arteries and veins of the placenta, the resistance to dilation of peripheral blood vessels decreases, causing the diastolic blood pressure of pregnant women to be lower than before pregnancy. In addition, the blood vessels in the entire pelvic area increase significantly during pregnancy and dilate highly, causing more blood to be concentrated in the lower abdomen where the uterus is located. In addition, the enlarged uterus compresses the return of the inferior vena cava, reducing the amount of blood returning to the heart, resulting in a decrease in cardiac output, causing hypotension and transient cerebral ischemia.

4. Due to pregnancy reactions, people eat less, which is often accompanied by hypoglycemia, which can easily cause dizziness and blurred vision during pregnancy. This is especially likely to occur when standing up suddenly, standing for a long time, taking a bath, or being in a crowded crowd. To prevent this phenomenon, you should stand up slowly and avoid standing for long periods of time. If the above symptoms occur, you should squat down immediately or lie down and rest for a while. If this phenomenon occurs frequently, you may suffer from anemia, low or high blood pressure, malnutrition or heart disease, and you should seek medical attention in time.

As mentioned above, when facing dizziness and blurred vision in pregnant women, the cause of dizziness and blurred vision in pregnant women needs to be understood from multiple aspects such as early pregnancy, mid-pregnancy and pregnancy reactions. Usually, the causes of dizziness and blurred vision in pregnant women are different in different stages of pregnancy.