Sneezing or as it is medically called sternutation is the sudden and involuntary expulsion of air from the air and is generally the body’s reaction to irritants in the nose or throat. Common factors that can trigger sneezing are allergens, common cold or flu, strong smells, chemicals, nasal irritants and even drug withdrawal. Periodic sneezing is common and healthy. Treatment for continuous sneezing is really important to avoid any further problems.