A 4-month-old baby who cries more than once may be caused by physiological factors such as hunger, or may be suffering from respiratory tract infections and other diseases. 1. 4 months baby crying more than, may not be timely feeding caused by hunger, or urination and defecation is not timely change diapers, resulting in physical discomfort caused by crying more than, after feeding or changing diapers, crying more than the phenomenon can be relieved. 2. If the baby suffers from certain diseases resulting in physical discomfort, such as respiratory tract infections caused by fever, gastrointestinal allergies resulting in colic, eczema resulting in itchy skin, etc., will lead to babies cry more than the phenomenon. 4 months baby crying more than, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.