Why sneezing?

The sneeze has always intrigued man. When a person is preparing to sneeze aspires about two and a half liter of air, which flows through the lungs and out shot in the mouth and nose at an average speed of 110 to 160 kilometers per hour. At that time acting as the muscles of the chest, mouth, face, abdomen and diaphragm, the vocal chords and eyelids. 
The brain registers the tingling that percude the nasal mucosa in the presence of an agent strange and Cardin all the muscles involved in a sneeze. However, anything that breaks that can cause tingling sneezing; that includes strong odors and temperature changes, but there are people who sneeze if you touch the eyebrows, leaving the sun after having been filled or if you look at a bright light. 
To avoid the mass diseases that affect the performance of the nasal mucosa - whose role is to prevent the passage of foreign matter like dust, pollen, lint, chemicals and viruses or bacteria - there are to wear a diet in which abundant vegetables and fruits rich in vitamin C; take at least two liters of water a day, did not attend crowded places with little ventilation and if they are sick (at least until it heals), and lubricate the nasal mucosa with saline. The otolaryngologist is a specialist who can determine the origin of the sneezing and treatment to follow.