Allergic asthma is in those who have natural inborn allergic physical condition. Given some triggering factor, such a house-hold dust, flour, or pollen, they have an allergic reaction which causes the amount of sputum to increase, and the air passage to narrow, resulting in asthma attacks.
過敏性是具有先天過敏體質的人，對於某些過敏原，如家塵（室內灰塵）、花粉、空氣污染、黴菌，或刺激性的氣味，如蚊香、香水、油漆等產生過敏反應，使痰量增加、氣管變窄而導致氣喘。