Can your phlegm colour tell you when to see a doctor?To play this video you need to enable JavaScript in your browser.This video can not be playedCan your phlegm colour tell you when to see a doctor?CloseListen to the full episode on BBC Sounds.SubsectionHealthPublished6 NovemberShareclose panelShare pageCopy linkAbout sharingRelated topicsHealthFollow Healthclose panelYou are now following HealthUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description