Two-month-old infants with phlegm sounds in the throat are commonly associated with the following diseases; first, lung and airway diseases, commonly bronchitis, pneumonia and other related infectious diseases, because of inflammatory lesions of the lungs and airways that cause secretions to pour into the throat to form phlegm, when the patient breathes there is a phlegm sound, in this case it is recommended to go to the pediatric department to do a lung examination, auscultation can sometimes hear the lungs In this case, it is recommended to go to the pediatric department for pulmonary examination. During auscultation, sometimes dry rales, wet rales or croup can be heard in the lungs. Second, the child has congenital laryngeal cartilage dysplasia, in this case when the child breathes may appear phlegm sound, if localized with infection may appear breathing difficulties and other performance.