Most of the white thin phlegm belongs to cold phlegm. It can be caused by the invasion of cold evil, or the deficiency of spleen yang. It needs to be treated by relieving cold from the surface of the body, warming the yang and removing the phlegm to help improve the symptoms as soon as possible. Cold phlegm is mostly white, clear and thin phlegm, clinically caused by wind-cold lung, usually accompanied by foam in the phlegm, nasal congestion, sneezing, runny nose, dry mouth, itchy throat, and thin white tongue coating, etc. The treatment mainly focuses on dispersing cold and dispersing the epidermis, and follow the doctor’s instructions to take pungent and warming antidote to alleviate the epidermis, such as wind-cold and cold granules. The contraindications and adverse effects of this drug are not clear. Avoid smoking, alcohol, spicy, cold, greasy food. It is not advisable to take tonic Chinese patent medicines at the same time. It should not be used for fever and cold. It is recommended that in addition to active treatment, patients with coughing white sputum, but also adjust the daily life style, to maintain a light diet, regular work and rest time, to ensure that every day enough sleep and strengthen the warmth of care, etc., to develop good habits, to avoid the influence of unfavorable factors lead to aggravation of the condition. The above medications should be taken under the guidance of a physician. If you feel unwell, you should go to the hospital in time to find out the cause of the problem and then treat it, rather than blindly using medication on your own.