what is the cause of people sneezing
As mentioned above, allergies account for the most common cause of chronic sneezing. This is often seen in allergic rhinitis, which may either be perennial (present all year) or seasonal (occurs intermittently, usually during certain seasons like spring).
Chronic Sneezing | Causes of Persistent, Constant Sneezing Fits. Sneezing is a normal reflex that occurs in response to irritation in the nasal passages. In most cases it is acute, lasting anywhere between a few minutes to several days often caused by airborne irritants like smoke or acute upper respiratory tract infection like the common cold.
For other uses, see Sneeze (disambiguation). A sneeze, or sternutation, is a semi-autonomous, convulsive expulsion of air from the lungs through the nose and mouth, usually caused by foreign particles irritating the nasal mucosa. A sneeze expels air forcibly from the mouth and nose in an explosive, spasmodic involuntary action resulting chiefly from irritation of the nasal mucous membrane.