Colds are usually viral infections with an acute onset. The main manifestations are mainly nasal symptoms, such as sneezing, nasal congestion and clear watery nose, but also coughing, coughing and dry throat. Usually after 2-3 days, there will be sticky nasal discharge, still accompanied by coughing, coughing sputum and breathlessness. If the cough has yellowish sputum with blood at the same time, the possibility of combined bacteria is considered. Then you should choose oral penicillin, first-generation cephalosporins, macrolides or quinolones for antibacterial treatment, depending on the local epidemiology or empirical medication. At the same time, you should drink some phlegm-removing drugs, aminoglutethimide oral solution or acetylcysteine effervescent tablets, for phlegm-removing and expectorant treatment. It helps to expel the phlegm after the cold and the treatment of cold will be better.