Izimpawu zokungezwani komzimba ziningi futhi ziyahlukahluka. Ngaphezu kwalokho, ziyanda ngokuqhubekayo: i-WHO ilinganisela ukuthi u-50% wabantu bomhlaba bazothinteka ngenxa yokungezwani komzimba ngonyaka ka-2050.

I-Urticaria ukungezwani komzimba nesikhumba. Kubonakala ngokubonakala kwezinduna ezibomvu, ezivuvukile, ezihlukanisiwe noma eziqoqene ezibangela ukulunywa.

I-acute i-urticaria iqala ukungezwani futhi ibonakala ngokushesha ngemva kokuxhumana ne-allergies element. Izinkinobho zizoba khona isikhathi esishintshayo: ukusuka emaminithini ambalwa ukuya emahoreni ambalwa.