How is nasal irrigation helpful in rhinorrhea? would it not make the nose run more? how does it work?

Nasal Irrigation: It helps in certain cases on a temporary basis... A cold or flu, a bad allergy attack, etc. Long term you can become addicted to irrigation and your nose will no longer function on its own.

Reduces inflammation: Nasal irrigation helps to flush irritants such as pollen, inflammatory chemicals from allergy or viral or bacterial infections, or bacteria and biofilms all of which create inflammation, the major cause of rhinorrhea.Less inflammation=less mucous.Bacterial nasal infection often begins with injury to the lining allowing the bacteria to adhere and proliferate. Most sinus infections begin in nose.