Patients who have recovered from a cold and have phlegm in the throat all the time, if the phlegm is relatively small, it is fine to drink more water appropriately, and if the phlegm is particularly large, expectorant medicine can be used. When you get well from a cold but the local inflammation still exists, it is easy to produce more secretions, so it is easy to have phlegm in the throat when you get well from a cold. In this case, it is not necessary to take medicine. If the phlegm is relatively small, it is easy to expel the phlegm from the body by drinking more water to dilute the phlegm properly. If the phlegm is more, you can let the patient use phlegm-transforming medicine or expectorant medicine, in the case of using these medicines, it will reduce the phlegm to gather locally in the throat, and it should significantly relieve the symptoms.