It's early spring again, and it's the season that many people are allergic to pollen. So what is pollen allergy? Why do some people have pollen allergy? Next, let's have a look with the small weaving of the four seas net.
Why can somebody pollen allergy in spring? What symptom can pollen allergy have?
Some people will have pollen allergy as soon as they are exposed to fresh flowers. Those who are light will have itchy eyes, stuffy nose, runny nose and other symptoms. Those who are serious can induce asthma, allergic dermatitis, laryngeal edema, urticaria and other diseases. Why is that?
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Why can somebody pollen allergy in spring? What symptom can pollen allergy have?
In medicine, it is believed that the normal human body has a physiological protective immune response, that is, when foreign substances (i.e. antigens) invade the human body, the human body will produce immunoglobulins (i.e. antibodies) through immune lymphocytes, neutralize or digest the antigens to protect the human body.
However, for people with allergic constitution, because the immune response is beyond its due degree and scope, they will have abnormal and excessive reactions to normal substances (allergens), thus damaging some normal cells, tissues or organs of the human body, and allergic phenomenon will occur.
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Why can somebody pollen allergy in spring? What symptom can pollen allergy have?
So, how does pollen make people allergic? Generally speaking, the process is divided into two stages. In the first stage, when pollen enters the eyes, nose and lungs for the first time, it will activate the immune system in the human body, especially in allergic people. At this time, their bodies will secrete more than ten kinds of antibodies, which are attached to mast cells, and will 'Remember' the rejection of pollen.
In the first stage, the human body is not allergic symptoms, the real allergic reaction is the second stage. When the allergic person contacts the same kind of pollen again, these pollen and antibody meet and combine, mast cell begins to secrete a kind of substance called histamine. Histamine molecules can travel to the eyes, nose and other receiving organs, causing blood vessel expansion, leading to hyperaemia, itching, runny nose, sneezing and other allergic symptoms.
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