amount of mucus produced each day
- Mucus is gross. 1  But here are 9 things you should know about it. 2  1) You produce about 1.5 quarts of mucus a day â and swallow the vast majority. 3  2) Mucus is basically the body's flypaper. 4  3) There are two different things that cause runny noses. 5  4) A stuffy nose isn't stuffed full of mucus â it's swollen.