Pollen is the male reproductive cell of various plants, which is equivalent to the sperm of mammals. Pollen is a fertilization unit. Some people have allergic reactions after inhaling pollen, that is, pollen allergy, also known as "seasonal allergic rhinitis", which is a series of pathophysiological processes caused by allergic constitution patients being sensitized by pollen.
Although the incidence of pollen allergy symptoms is high, it is caused by very few pollen. The reason why pollen can cause human allergies is mainly because pollen particles carry antigenic determinants that can cause allergies. The typical clinical symptoms of pollen allergy are sneezing, watery runny nose, itchy nose, eyes, ears and palate, which may be accompanied by dyspnea or urticaria and eczema.
In March, spring warms bloom. At this time, people are most likely to be allergic to pollen. When traveling in spring, beware of pollen allergy.
Allergy is an allergic reaction of the body and an abnormal reaction of people to normal substances. Only when allergens come into contact with people with allergies will allergic reactions occur. There are hundreds of allergens such as pollen, dust, foreign proteins, chemicals and ultraviolet rays, and some allergens can't even be found.
The incidence of allergic diseases is about 20%. It occurs in all ages from newborns to middle-aged and elderly people, with no obvious gender characteristics, but with obvious genetic characteristics.
On the one hand, due to the improvement of people's living standards, a large number of high-protein and high-calorie diets such as eggs and meat products are ingested in the diet, which leads to the hyperactivity of antibodies in the body, so allergic reactions are more likely to occur when encountering antigens such as pollen.
On the other hand, due to air pollution, water pollution and the extensive application of food additives, people are exposed to more antigenic substances, which leads to allergic diseases.