Generally, it is easy to catch a cold in winter, and it is easy to catch a cold in summer. Cold and heat colds are characterized by runny nose, excessive phlegm and strangeness. Wind-heat cold is characterized by dry mouth, dry throat, stuffy nose and stuffy heart. This is Chinese medicine's understanding of cold. Cold-heat colds advocate drugs such as dispelling cold and relieving exterior syndrome, while wind-heat colds advocate drugs such as cooling exterior syndrome and reducing fever. You can refer to it