Sneezing is a protective reflex of the upper airways; in medical terminology it is also called sternutation. Sneezing is the act of expelling a sudden and uncontrollable burst of air through the nose and mouth. Sneezing is the physiological response of the mucous membranes, i.e. the lining of the respiratory tract which is most commonly the nose and throat, to the irritation caused by various chemical agents, biological agents and even environmental triggers.

The nasal membrane is the check post, making sure it’s free of dirt and bacteria. In most cases, the nose traps this dirt and bacteria in mucus; then the stomach digest the mucus, which neutralizes any potentially harmful invaders. Sneezing can be triggered by:
 * Viral agents, those causing flu and common cold
 * Nasal irritants; chemical, physical and biological
 * Inhalation of nasal corticosteroid  spray
 * Biological allergens
 * Certain drug withdrawal, like opioid narcotics
 * Trauma to nose
 * Inhalation of cold air

The best treatment is to treat or keep the offending cause at bay. By treating the infections with antiviral drugs and knowing the allergens with the help of the doctor or the symptoms you face. Changing the filters of the air-conditioning system frequently can help. If you house pets along, and their fur bothers you then make sure that they are cleaned and trimmed regularly. 

In extreme cases, you may need to get your home checked for mold spores, which may be causing your sneezing. If mold infests your home, you may need to move. Certain people require antihistamine drug such as cetrizine and chlorpheniramine maleate, these are most often used pills.

- Koya Satyasri