Clear and yellow nasal mucus are two forms of nasal mucus, yellow nasal mucus generally indicates the presence of infectious nasal mucus, such as bacterial inspired infections, such as sinusitis, etc., causing yellow nasal mucus. Clear nasal mucus generally indicates allergic diseases, without bacterial infection or viral diseases or early viral infections, which suggests that there are obvious differences in clinical medication, such as yellow nasal mucus, which may be related to bacterial infections and requires the use of antibiotics, such as cephalosporin antibiotics and macrolide antibiotics. Clear nasal discharge, in fact, is related to allergies and may require anti-allergy drugs as well as early stage of upper respiratory tract infections, and antiviral treatment is also required.