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The reasons and cold mechanisms

The cold can be the infectious and not infectious nature (for example, the finding of an alien body (beads, a globule) in a nasal course provokes a discharge from a nose). The infectious reason of occurrence of a cold at children, as well as at adults, dominates among other aetiologies. Most often a cold the viruses provoking an acute respiratory virus infection, including cause a flu. Getting with inhaled air on a nose mucosa, viruses get into the superficial cells having cilia, and there develop within 1-3 days. In norm cilia make oscillatory movements thanks to what there is a mechanical purification of a nose from foreign agents which protects an organism from possible infection with microbes. Viruses, break integrity of a mucosa of respiratory tracts. It to become more nontight. Conditions for joining also the bacteriemic infection which are the reason of complications of a cold are framed.

At a cold, besides a nose mucosa, it can be amazed and a mucosa perirhinals sinuses, and also a middle ear.

Most often the rhinitis is observed during the periods of sharp temperature fluctuations, that is bound to change virulence (infectious ability) microbes and with the frigorism factor. Especially expressed reaction of a mucosa of a nasal cavity is observed at cooling of feet. It speaks presence of reflex communications between stops and a nose.

Other reasons of a cold (not infectious) can be traumas of a mucosa of a nose alien bodies, influence of harmful factors of environment (a dust, a smoke, strongly smelling substances etc.), an allergy.

In any case there are conditions at which mucous a nose it is easily infected, reacting an inflammation.