Commonly inhaled allergens include house dust mites, dust, pollen, and animal dander. Ingested allergens include food (eggs, seafood, cow's milk), medicines (antibiotics, aspirin), and alcohol. Common skin-contact allergens are cosmetics, detergents, jewelry containing copper, insects, and so forth.
常見的吸入性過敏原有：塵 (、灰塵、花粉、動物皮屑等；吃進去的過敏原則包括食物（如蛋、海鮮、牛奶）、藥物（如抗生素、阿斯匹靈），以及酒精等；經由皮膚接觸的過敏原，常見的有：化妝品、清潔劑、含有銅成分的飾品、昆蟲等等。