We all have nightmares, and so do pregnant women. Dreams are a combination of various pieces of information stored in the body and brain during sleep to produce a context. Therefore, nightmares are the release of the real emotions in the brain, the main reasons are as follows: 1, pregnancy factors: women’s body hormone levels change after pregnancy, the level of progesterone gradually increased, resulting in pregnant women are more sensitive, emotions are prone to fluctuations, causing a decline in sleep quality, severe cases will be due to the tiny stimulation during the day caused by abnormal excitation of the cerebral cortex at night, prone to nightmares; 2, physiological factors: after pregnancy With the growth of the fetus pregnant women gradually urinate frequently, malnutrition and weakness of blood and Qi, blood does not nourish the gods appear difficult to sleep or easy to wake up; or because of the enlarged uterus compression of the inferior vena cava, so that the amount of blood returned to the heart to reduce the cardiac blood output decreased pregnant women can occur chest tightness and breathlessness and nightmares, or due to calcium deficiency caused by leg cramps and other symptoms, or emotional tension caused by physical discomfort, seriously affect the night sleep, there are studies confirming that nightmares or certain related diseases 3, environmental factors: poor sleep environment or sleep posture error, stimulated by light, temperature, sound and other factors, or play cell phones or games before going to bed leading to brain excitement; 4, psychological factors: pregnant women are too much mental stress, such as worry about the sex of the fetus, the health of the fetus, worry about the production process and other causes of internal fear, thinking too much; or when the birth of boys and girls and the relationship between the in-laws; or The situation of “thinking about the day and dreaming about the night” occurs when you are worried about how to sit on the moon. To sum up, dreams are a subconscious expression of emotions, and nightmares are the release of real emotions, caused by a variety of factors. However, in order to completely solve the nightmares, we must first start with psychological treatment, study the handbook for pregnant women, learn about humanities and ethics, correctly understand the physiological knowledge of pregnancy and how to deal with the relationship between mother-in-law and daughter-in-law, and make adjustments and solutions according to our actual situation, so as to gradually eliminate the troubles caused by nightmares.