Most of the colds with stuffy nose and pus nasal discharge have heat, which can be either external wind-heat or internal heat from external wind-cold, which is what we call a cold that contains fire. There is another kind of cold that may last a little longer, about a week or so, and it may be a cold where the external cold enters the internal heat. In short, if there is thick nasal discharge when you have a cold, generally speaking, this cold should not be treated purely for external sensation, but should have medicine for clearing heat, not just for dispersing wind-heat or for dispersing superficial cold or superficial evil. At this time, you need to have medicine to clear heat, that is, you need to use some bitter cold medicine to clear internal heat. Because the nose is a lung organ, if there is pus nasal discharge inside the nose, most of the lung heat is already obvious, and the next step is expected to be coughing or pus phlegm. At this time, we must clear the heat in time to prevent the heat of the cold from invading into the lungs.