There are several reasons for thick and yellow nasal mucus: 1, thick and yellow nasal mucus belongs to a type of wind-heat cold from the perspective of Chinese medicine, accompanied by dry throat, sore throat, purulent secretions in the throat, cough, coughing phlegm, accompanied by fever, while there is also a high fever and other symptoms are wind-heat cold. 2, from the perspective of Western medicine thick and yellow nasal mucus accompanied by a body temperature of 38.5 ℃ or more, cough, coughing pus sputum, difficulty in breathing, etc., usually caused by bacterial infection. The symptoms are usually caused by bacterial infection. At this time, you should take medicine and local anti-inflammatory treatment, for example, oral western medicine such as levofloxacin, cephalosporin and penicillin. You can also take Chinese herbal medicines such as Chai Hu granules, Vitamin C silver warp tablets, Ban Lan Gen and Shuang Huang Lian. Local nasal cavity should be treated with physiotherapy and microwave therapy, and nasal rinsing can also be applied to improve the symptoms of yellowing pus.