As soon as a patient inhales an allergen, such as cold early morning air, carpet dust, or fibers from a stuffed toy, an itchy, runny, or stuffy nose, or sneezing can be the result.
病患一旦吸入過敏原，像是清晨時的冷空氣、地毯裡的灰塵、玩具的絨毛等，鼻子就會產生發癢、打噴嚏、流鼻水、鼻塞等各種症狀。