Itchy throat and cough after cold are clinically considered to be caused by pharyngitis. When patients have symptoms of itchy throat and cough, they are considered to be viral infections, which can be treated symptomatically, such as oral licorice tablets, containing golden voice tablets and fat sea tablets, etc. After the above treatment is ineffective, it is recommended to consult a doctor to improve chest X-ray, blood routine, C-reactive protein and other related examinations to determine whether the infection is secondary to bacterial infection. The common pathogens of respiratory tract infection include viruses, bacteria, atypical pathogens, etc. Different drugs are used for different pathogens, such as oral amoxicillin, cefixime, levofloxacin, azithromycin for bacterial infection, Qingkailing, busulfan, oseltamivir for viral infection, azithromycin, erythromycin, levofloxacin for atypical pathogens, etc.