If you have a yellow nose when you have an external cold, most of them are caused by internal heat or wind-heat cold. External cold and internal heat means there is internal heat, so you can clear the heat directly, because the external evil enters the heat inside faster, so clear the heat in time. If it is a common wind-heat external cold, it can be treated by removing wind, relieving the symptoms and clearing heat. If the yellow nose is not caused by external sensation, it is due to chronic rhinitis or chronic sinusitis, which keeps discharging phlegm-heat nasal mucus outward, we must actively help the patient to do pus drainage treatment, and can also do drainage or suction treatment. Chinese herbal medicine can be used to clear heat, because yellow nose belongs to heat evidence, only drainage is to treat the surface but not the root.