why does one catch a runny snout?

i understand that you hold a virus/bacteria etc etc,
but what does the body hope to achieve by flooding your sinuses and antenna with -for a dearth of a better term- "snot"? All of the extra phlegm is your body flushing out the infection. Rather than puss (like in a pimple, or cut) it comes out as phlegm through your nose/mouth.
it's any 'cause you have a cold, flu or allergie.
It's newly an automatic response from the body to deal beside an onslaught of more virus/bacteria on the nasal nouns. From the point of view of the body, it is especially effective. When the number of invaders reach a certain point that it's unmanageable, the body will resort to one of its strategy to kick out the existing bugs and prevent more from coming. Notice that usually a runny snout is accompanied or followed but plentiful other symptoms. It's part of a routine flushing because the body is self taken over.
In many individuals this whole system can overreact when not essential; it's as if the body was paranoid. That would be an allergy.
that 's corect because when adjectives of the extra phlegm is your body flushing out the infection. Rather than puss (like in a pimple, or cut) it comes out as phlegm through your nose/mouth. It its really yucky