Zizindikiro za ziwengo ndi zambiri komanso zosiyanasiyana. Kuphatikiza apo, akuchulukirachulukira: WHO ikuyerekeza kuti 50% ya anthu padziko lonse lapansi adzakhudzidwa ndi ziwengo pofika 2050.

Urticaria ndi ziwengo zapakhungu. Amadziwika ndi maonekedwe a ziphuphu zofiira, zotupa, zodzipatula kapena zamagulu zomwe zimayambitsa kuyabwa.

Acute urticaria ndi matupi awo sagwirizana ndipo amawonekera mwachangu mukakumana ndi allergenic element. Mabataniwo adzakhalapo kwa nthawi yosinthika: kuyambira mphindi zingapo mpaka maola angapo.