The causes of fever after cesarean delivery are: a. Upper respiratory tract infection. Postpartum maternal resistance is relatively weak, the common cold may induce respiratory tract infection, resulting in fever. Second, milk distension. If the mother secretes too much milk and the baby consumes less, the milk may accumulate and cause acute mastitis and fever. Infection of the abdominal incision. Poor healing and pus accumulation in the abdominal incision of cesarean delivery may cause infection. IV. Infection of reproductive tract and pelvis. It is manifested by the foul smell of maternal malaria, abdominal pain, and pressure pain in the body of the uterus. Regardless of which of the above causes of maternal fever should promptly seek medical attention to avoid delaying the diagnosis and treatment of the disease.