The baby’s throat pus, may be pharyngeal diphtheria or infectious mononucleosis and other diseases caused by, should be under the guidance of a professional doctor for drug treatment, nebulizer inhalation treatment, if necessary, consider intravenous infusion treatment. 1. Pharyngeal diphtheria: an acute infectious disease caused by virulent diphtheria bacillus, which can appear as a film-like white exudate resembling pus on the tonsils. Affected children should be hospitalized and isolated, bedridden for at least 2 weeks. Early and adequate injection of diphtheria antitoxin, timely use of penicillin, erythromycin and other antibiotics. 2. Infectious mononucleosis: caused by EBV infection, mostly seen in children, is an acute or subacute infectious disease. Children’s tonsils are obviously enlarged, and in some cases there may be pseudomembrane formation on the surface of the tonsils. There is no effective clinical treatment, mainly symptomatic treatment. Intravenous immunoglobulin can make the clinical symptoms improve, α-interferon also has a certain therapeutic effect. If the baby’s throat is pus, it is recommended to cooperate with a professional pediatrician for examination as soon as possible, and standardize the use of medication and treatment to avoid aggravation of the condition.