There are many reasons for emotional instability after pregnancy, which can be broadly categorized into endocrine disorders, lack of adaptability to role changes, and psychological problems caused by physical changes. 1. Endocrine disorders: the hormonal changes in the body during early pregnancy can trigger endocrine disorders, which can easily lead to emotional instability and temper tantrums. 2. Inadaptation to role change: some mothers-to-be may change from work to family environment because of pregnancy, then the previous social relationship is also a corresponding change in the relationship between family members, this sudden change in interpersonal relationships may also lead to the mother-to-be’s emotional problems. 3. Physical changes caused by psychological problems: some girls who love beauty after pregnancy may be due to the body fat, out of shape and have concerns, and then psychological problems, triggering anxiety, irritability and so on. Pregnant women are in a special period of physical and psychological, need to do a good job of daily emotional adjustment, such as the emergence of abnormalities need to go to the hospital in a timely manner.