One and a half year old baby has phlegm whirring inside the throat mostly because of respiratory tract infection, respiratory tract infection bronchitis or pneumonia most often can hear phlegm whirring between the throat, so not only to eat cough and phlegm medicine, like pediatric fixed asthma oral liquid, pediatric pulmonary cough granules or pediatric cough and wheezing oral liquid and other symptomatic cough and phlegm, but also to treat the root cause of bronchitis or pneumonia, you can take oral anti-inflammatory drugs, like cephalosporin, penicillin drugs or mycoplasma infection, you can take azithromycin, roxithromycin or clarithromycin. For cephalosporins, penicillins or mycoplasma infections, you can take azithromycin, roxithromycin or clarithromycin. If there is a lot of phlegm, pat the child’s back and encourage him/her to cough more. If there is still a lot of phlegm, you can use a sputum tube to pump it to relieve the symptoms locally.