White sputum is usually seen in lung-heat coughs. Most white sticky sputum in clinical practice actually belongs to wind-cold, cold-damp coughs, which are usually accompanied by bad wind, bad cold, nasal congestion, runny nose, and a pale, fat tongue with teeth marks, and are easy to identify. In contrast, once white phlegm occurs it is very sticky and not easily coughable, and it is often thought that too much water is lost in the respiratory tract and that lung heat is contained in the lungs leading to dehydration of the phlegm that cannot be easily coughed out. Therefore, white sticky sputum is very different from white foamy sputum, because white sticky sputum should not be misdiagnosed as caused by wind-cold or cold-damp cough, but should be judged closely according to whether the patient’s tongue is red or not, whether the dryness of the mouth is severe or not, and whether the stool is constipated or not to determine whether it has turned into heat and give treatment to clear heat and resolve sputum.