In hayfever, histamine causes inflammation of the nose, eyes, skin or airways and results in itchy watery eyes, a runny nose, sneezing and nasal congestion.

• 在干草热发生时，组胺能引起鼻子，眼睛以及皮肤的炎症反应，出现眼睛流泪发痒，流鼻涕，打喷嚏和鼻塞等症状。