The advantages and conveniences of modern life, together with excessive stress on modernization, increased incidence of allergies in the past 20-30 years therefore contributed new allergens, environmental pollution, life in captivity and what not. Other factors such as cigarette smoke or smog street can provoke allergy. Often it appears that the person is allergic to more than one substance. If you spend more time in the closed room, you will have exposure to many allergens in the home as dust, molds, pet. Most often, however, remain allergic to pollen of trees, grasses and weeds. Air pollution in cities makes these flights more aggressively, which in turn increases the severity of the symptoms of allergy. Studies show that people in urban areas are more affected by your allergies than those in rural areas.
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