There are many reasons why a cold can cause a sore throat and cough, usually due to pharyngitis or tonsillitis. 1. Laryngitis: Sore throat and cough due to laryngitis is caused by congestion and edema in the throat due to viral infection after a cold, which leads to the symptoms of sore throat. 2. Tonsillitis: because bacteria, viruses or a mixture of both infections, can cause tonsil enlargement, accompanied by obvious symptoms of sore throat, it is recommended that patients can use penicillin, compound borax solution, compound chlorhexidine containing radical solution and other drugs under the guidance of the doctor. For penicillin allergy is prohibited to use. There are many reasons why colds cause sore throats and coughs, and it is recommended that patients seek medical attention in a timely manner to clarify the cause of the disease and standardize treatment under the guidance of the doctor.