Histamine released by these cells causes small blood vessels to dilate, giving rise to the well-known symptoms such as itching and swelling in the mouth, skin rash, itchy or runny nose or diarrhoea.
由这些细胞释放出的组胺导致小血管扩张，引起众所周知的症状，比如搔痒、口腔肿胀、皮疹、鼻子发痒或流鼻涕，或腹泻。
There are many superstitious about itching. For example, an itchy nose means you're going to have a quarrel with someone.
对于身上某个部位发痒，人们有很多迷信说法。比如，鼻子发痒意味着你将会和某人吵架。
我的鼻子痒。
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