It turns out that this is the cause of the runny nose.: Very few people know this function

runny nose, It is a health problem that occurs as a result of excessive fluid production from the mucous membranes in the nose..

Common cold, grip, caused by allergic reactions or environmental factors. Color and consistency of the discharge, Can provide information about the underlying cause. While a transparent and thin discharge may indicate allergic causes, A dark and thick discharge may be a sign of infection.