The main culprit for pollen sensitivity is not "flowers" but "trees".

, Beijing, April 11 (Xinhua) -- For some allergy groups, spring pollen is a lingering problem. Usually, people think that it is the bees, butterflies and other pollinators of delicate flowers caused allergies, but the main culprit of pollen sensitivity is not "flowers", but "trees".
pollen, is the male cells of plants in nature, because species are different, their size, shape, structure vary widely, the vast majority of microns in units. In the spring, when the plants bloom and scatter their leaves, pollen is dispersed into the air with the help of the breeze, butterflies and bees, allowing the reproduction of the plants to continue.
Beijing Meteorological Bureau, pollen family is mainly "worm-borne" and "wind-media" two types of pollen. Free pollen in the air does not come from flowers that rely mainly on "worm-borne" transmission, but mainly from the "wind-borne" spread of berco, Yang Liuke and other types of trees. Because the "wind media" pollen is smaller and spreads more widely under the effects of the wind, it is more likely to be inhaled and lead to allergic reactions. For example, endless sneezing, snot, and itchy symptoms in the eyes or outer ear.
addition, leading to allergy symptoms, in addition to relying on the "wind media" spread of tree pollen, there are wrapped in tree seeds flying. In the case of the most common female and male willows, the willow female flower sequence, after pollination, produces a smallfruit, in which the bread is white floc-shaped fluff. These fluff hides some sesame-sized seeds, with the development of smallfruit gradually cracked, white floc fluff will carry seeds flying with the wind sowing, the formation of the phenomenon of willow fly.
The Beijing Forestry Science and Technology Promotion Station, Yang Liufei flocs are cyclical and seasonal, due to differences in tree species and ambient temperature, the flocs period generally from early April to late May, lasted about 50 days.
Beijing Tongren Hospital nasal allergy department chief physician Ouyang Yu introduced, pollen allergy patients can be two weeks before the arrival of pollen period to use anti-allergy drugs, preventive medication, help to delay the start of allergy symptoms, or reduce symptoms, the drug can be used until the end of pollen period.
experts suggest that pollen allergy people can query their allergy plant pollen spread time, take measures in advance to protect. Depending on plant species, the first peak of pollen concentrations in Beijing is usually from mid-March to mid-April, and the second peak is from mid-to-late April to mid-to-late May.