Is it unhealthy to swallow one 's own phlegm during a cold or a flu ? Are there any ill effects or benefits from swallowing or not swallowing phlegm ?
`` Why is phlegm called '' `` phlegm '' '' when it is in the throat , and '' `` mucus '' '' when in the nose ? And why does phlegm stay in the throat and not get swallowed into the stomach ? ''