Acute pharyngitis is mainly caused by viral infections, such as rhinovirus, adenovirus and respiratory syncytial virus, which can cause acute pharyngitis. For sore throat and white phlegm, you can take oral Chinese medicine with anti-viral effect, such as Four Seasons Anti-Viral Oral Liquid and Pudilan Anti-Inflammatory Oral Liquid, and also take cough and phlegm medicines, such as Chuanbei Loquat Paste and Lung Power Cough Compound, which can effectively improve the symptoms of sore throat and phlegm, and also pay attention to drink more warm water and eat lightly.