Histamine is a chemical your own body makes. When you have an allergy — to pollen, dust, some foods, or a sting — certain cells let out histamine, and that is a big reason you itch, sneeze, swell, or get a runny nose. Antihistamine on a medicine box means a drug that blocks this chemical, so those feelings calm down.

Histamine組織胺 is是 a chemical your own body makes你自己身體會製造的一種化學物質。When you have an allergy — to pollen, dust, some foods, or a sting —當你對花粉、灰塵、某些食物、或被叮咬過敏時， certain cells某些細胞 let out會釋放 histamine組織胺， and that is a big reason這是一個很大的原因， you itch, sneeze, swell, or get a runny nose讓你發癢、打噴嚏、腫起來、或流鼻水。Antihistamine on a medicine box藥盒上的「抗組織胺」 means指的是 a drug that blocks this chemical一種能阻斷這個化學物質的藥， so those feelings calm down所以那些感覺就會緩和下來。

Though actually histamine is not only an allergy chemical. It also helps the stomach make acid for food, so it has quiet jobs on ordinary days, not only on hay-fever days.

Though actually不過其實 histamine組織胺 is not only並不只是 an allergy chemical過敏的化學物質。It它 also也 helps the stomach make acid for food幫助胃製造消化食物的胃酸， so所以 it它 has有 quiet jobs平常安靜在做的工作 on ordinary days在普通的日子裡， not only on hay-fever days不只是在花粉熱發作的日子。

You do not buy histamine in a shop. It is already inside you.

You你 do not buy不會去買 histamine組織胺 in a shop在店裡。It它 already已經 is inside you在你體內了。

Doctors and medicine labels use the word; everyday talk often just says allergy. The name is built from histidine, a piece of protein, plus amine, a kind of chemical piece.

Doctors and medicine labels醫生和藥品標示上 use the word會用這個詞； everyday talk日常說話 often just says allergy常常就只說「過敏」。The name這個名字 is built from是由 histidine組胺酸 (a piece of protein一種蛋白質的組成部分) plus加上 amine (a kind of chemical piece)胺（一種化學結構單元）組成的。