If a five-month-old baby shouts at the top of his lungs, it is usually caused by emotional excitement, a desire to attract parental attention or physical discomfort. Parents need to observe the child’s state and accompanying symptoms when shouting, if it is a normal phenomenon, no special treatment, if a long time difficult to relieve the need to go to the hospital to identify the cause of the disease. 1, emotional excitement: because babies do not have the ability to speak, emotional excitement will usually appear shouting response, parents can give a response to calm the child’s emotions; 2, exercise vocal: five-month-old baby language shouting at the top of his voice, may be trying to speak. Shouting, may want to speak, in the exercise of their own vocal function, parents can tutor from the side, word by word teaching; 3, attract attention: if a long time without interaction with the baby, the baby may attract attention by shouting, so that parents to meet their wishes. Parents should spend more time with the baby to avoid the baby being alone for a long time, creating a sense of loneliness; 4, physical discomfort: if the baby has some discomfort factors, such as being small stool or appearing hungry, cold, pain, etc., will be expressed through shouting. Parents should actively investigate whether the child has any discomfort symptoms and help the baby change diapers and breastfeed to restore comfort. If the baby shows symptoms of shouting, care and help should be given as soon as possible so as not to neglect the factors of the baby’s discomfort, and also to avoid the baby crying for a long time, resulting in damage to the vocal cords and throat.