Many of us have had this kind of experience: in spring and autumn, our eyes and nose itch, tears turn to zero, our face and nose swell and miserable. People will feel very tired, exhausted and unable to sleep well. The autumn wind is spirited and the allergy season is coming again! At this time, more than 30% of the people suffer from it. In the United States, allergies are roughly classified as seasonal and perennial, so-called perennial, that is, a whole year. In Europe, allergies are classified according to the severity and duration of symptoms. Although allergic patients may not care about the difference between these classifications. However, the American classification helps us identify allergens. European taxonomy helps guide Read More …