In a common itch like a mosquito bite , cells in the skin release a chemical called histamine .
普通的痒比如蚊子的叮咬，皮肤细胞释放一种叫组胺的化学物质。
Basophils are not true phagocytes but contain large amounts of histamine as well as other mediators of inflammation .
嗜碱性粒细胞不是真正的巨噬细胞，但也含有大量的组胺和其他炎症介质。
Certain sensory neurons respond to the histamine and carry the " itch " message up to the spinal cord .
特定的感觉神经细胞感觉到组胺，把“痒”的信息传递到脊髓神经。
Once my body understands that these new things are not actually invaders , it won 't release the histamine response .
一旦身体知道到这些新东西并不是入侵者，就不会产生组胺反应了。
When you 're exposed to the allergen again in the future , these antibodies release a number of immune system chemicals , such as histamine , that cause allergy symptoms .
