Postnatal blues is a temporary emotional disturbance experienced by new mothers within the first two weeks after childbirth, resulting from hormonal and lifestyle changes. Symptoms include mood swings, tearfulness, irritability, anxiety, and difficulty concentrating. Unlike postpartum depression or psychosis, postnatal blues does not interfere with a mother's ability to care for her baby and usually resolves without medical intervention. The primary cause of postnatal blues is hormonal fluctuations following childbirth, including a drop in estrogen and progesterone, changes in oxytocin and prolactin, and thyroid hormone imbalance. The psychological and emotional impacts of postnatal blues include sudden life changes, lack of sleep, increased responsibility, fear and anxiety, and cultural influences. Understanding the biological, emotional, and cultural factors influencing postnatal blues helps provide the right support and prevent it from developing into postpartum depression.