...The color ranges from white to red, and some are even hemorrhagic, and the area in which they occur varies. A distinction is made between acute urticaria, when such urticarial attacks occur once or last for a few days, and chronic urticaria, when they occur repeatedly for a month or more. The causes are diverse, but in cases of allergies, the antigens include food (seafood, meat, eggs, dairy products, soybeans, etc.), medicines (antibiotics, sulfa drugs, serum, etc.), substances derived from the living environment (pollen, dust, mites, fragrances, etc.), and substances produced within the body (due to inflammation, tumors, metabolic disorders, etc.). *Some of the terminology explanations that mention "acute urticaria" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…色調も白色~紅色,さらに出血性のものもあり,生じる範囲もさまざまである。このような蕁麻疹発作が1回,あるいは数日で終わるものを急性蕁麻疹,それが1ヵ月以上反復するものを慢性蕁麻疹として区別している。病因は多様であるが,アレルギーによる場合の抗原としては,食物(魚介類,肉類,卵,乳製品,ダイズなど),薬剤(抗生物質,サルファ剤,血清など),生活環境に由来する物質(花粉,塵埃(じんあい),ダニ,香料など),生体内で産生される物質(炎症,腫瘍,代謝異常などによる)がある。… ※「急性蕁麻疹」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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