The birth of a new life often brings endless joy to a family, however, survey data shows that 50% – 80% of women experience postpartum dysphoria (adjustment problems) after delivery, which develops 3-7 days after delivery with mild symptoms, mainly manifesting as emotional instability, frustration and crying, worrying and worrying, aggression, guilt, insomnia, loss of appetite, irritability, and concentration problems, most of which will resolve on their own within Most of these symptoms will resolve on their own within 10-14 days after delivery. However, about 15% of mothers will reach the level of postpartum depression. The symptoms of postpartum depression are more severe than the general degree of dysphoria, usually onset within 4 weeks after delivery, manifested as depressed, depressed, not happy; no sense of pleasure, no interest in anything; irritable mood, easily agitated tantrums; worry, nervousness and fear, excessive concern or worry about the child, or lack of interest in the child, fear of not being able to feed the child, fear of hurting the child themselves, fear of being alone with the child two Being alone at home, insomnia, loss of appetite, inability to take care of oneself and the child; pessimism and despair, feeling of helplessness, hopelessness, self-blame and self-culpability, self-injury and suicidal ideas and behaviors. In severe cases, altruistic suicide occurs because of the fear that the child will suffer in the world, i.e., killing the child first and then committing suicide. Postpartum depression not only produces significant impairment of maternal functioning, which may result in suicidal or altruistic suicide, but also has profound negative effects on the emotional, behavioral, and cognitive development of the infant. Research in object relations psychology has shown that good early mother-infant interactions are the basis for infants to form secure attachments, good moods, and smooth development of mentalizing processes, while depressed mothers have difficulty meeting the interactions needed for normal infant psychological development. The main causes of postpartum depression are as follows: 1. Postpartum neuroendocrine changes, such as a rapid decline in estrogen and progesterone in the body, changes in hormones such as thyroxine may cause maternal depression. 2. Among social factors, negative life events experienced by mothers, such as poor family relationships, couple separation, unemployment, and inadequate social support, are important triggers for postpartum depression. Postpartum families may focus more on the child and neglect the loneliness and loss brought by the mother may also contribute to the occurrence of low mood. 3. Psychological factors, such as failure to prepare psychologically and physically for the new baby and failure to identify with the changing social role of motherhood, can cause difficulties in adaptation and increase the risk of depression. Mothers who do not get along well with others, are emotionally unstable, childish, overly self-controlled or overly perfectionistic, and other personality traits are at high risk for postpartum depression. 4, in addition, the adverse physical factors and psychological factors promote each other, vicious circle, so that the physiological stress and psychological stress exceeds the limit of individual tolerance, it is easy to induce postpartum depression. Prevention of postpartum depression: The mother-to-be and the whole family can effectively reduce the occurrence of postpartum depression by making good preparations before pregnancy. The mother-to-be should prepare physically and psychologically, exercise and good physical fitness is good for postpartum recovery; psychologically, she should be ready to welcome the arrival of the newborn baby and be ready for the role of becoming a mother, such as learning the characteristics of the newborn baby, how to feed, how to hold, how to bathe, etc., and arranging her work, etc. For the husband and the whole family, giving subjective and objective support to the mother can effectively improve her coping ability. Postpartum depression is a common disease, patients and family members should not be overly nervous and afraid, as long as early detection, active adjustment and active treatment can avoid adverse consequences, the prognosis is generally good, with remission of symptoms and recovery of social and occupational functions. Mild to moderate depression can be treated with psychotherapy, and if the symptoms are getting heavier, medication or medication combined with psychotherapy should be used.