The exact cause of the asthmatic process is not well understood but it is thought to be triggered off by an allergy or when the lungs are irritated by something in the air.
Akaqondakali oyena nobangela wombefu kodwa kucingelwa ukuba ususwa kukwaliwa kwezinto ezithile ngumzimba womntu okanye xa imiphunga icatshukiswa yinto ethile esemoyeni.