Infants with phlegm in the throat should be given different treatments according to different causes. The following cases are common: 1. Bronchitis, bronchopneumonia, phlegm in the throat with cough and increased respiration can be given oral amiloride and, if necessary, anti-inflammatory symptomatic treatment such as azithromycin and cefixime. If it is still ineffective after 2-3 days of oral administration, cough with phlegm is aggravated or accompanied by wheezing, high fever and other symptoms, promptly go to the hospital. 2. Congenital laryngeal wheezing, which is present after birth, appears with throat similar to phlegm, which can be reduced when improving sleeping position, and can be improved after giving oral vitamin D and calcium.