Kube khona iziguli ezingenakubalwa eminyakeni edlule ezithola ukuqhuma komzimba ezinsukwini ezimbalwa emva kokubala izinwele zabo . Kunezizathu eziningi zezizathu ezahlukene - lokhu okujwayelekile kunazo zonke izinwele zoboya. Naphezu kwalokhu, cishe bonke abagulayo engihlangana nabo kubonakala bemangala ukuthi ukubala izinwele zabo kungaholela ekugqibeleni ubuso, ikakhulukazi ngoba basebenzise imbala yezinwele ezifanayo iminyaka (ngezinye izikhathi ngisho namashumi eminyaka) ngaphandle kwezinkinga.
Isizathu sokuthi ukuqhuma kuqala kuvele ebusweni ngemuva kokubala izinwele ukuthi isikhumba ebusweni sincane kakhulu, futhi sisebenza kakhulu kunesikhumba esikhumbeni. Eqinisweni, isikhumba se-scalp sinyene kakhulu, ukuthi ukusabela koboya bezinwele kuphela okungekho okubangela ukuthi kukhishwe isikhumba. Ngaphezu kwalokho, umuntu kungenzeka ukuthi wasebenzisa udayi oluthile lwezinwele iminyaka eminingi ngaphandle kwezinkinga - kuze kufike isimiso somzimba sokuzivikela emzimbeni kumakhemikhali ngokusebenzisa ukusika okungaboniwe, ukugxeka noma ukuphazanyiswa esikhumbeni - emva kwalokho amasosha omzimba aphendulela kumakhemikhali okwamanje on izinwele nesikhumba.
Izimpawu Zokunakekelwa Kwezinwele Zomzimba
Izimpawu zoboya obudaywe yizinwele zibandakanya ukuxhunywa komzimba (ukuhlambalaza okubomvu) okuvame ukwenzeka ebusweni, izinkophelo, izindlebe, nentamo. Ukuvuvukala okukhulu komzimba kungase kwenzeke ne-contact dermatitis kunombala wezinwele, okuvame ukungalungi nge-angioedema. Kodwa-ke, i- Angioedema , ngokungafani ne-dermatitis yokuxhumana, ayibomvu, ayishintshi, ivame ukuvela eceleni kolunye uhlangothi ngesikhathi, futhi ayiguli noma ayikho lapho ukuphulukiswa kuphulukisa.
Izimpawu zemibala yezinwele zezinwele ngokuvamile zivele ezinsukwini ezimbili kuya kwezingu-3 emva kokuba umuntu ebala izinwele zakhe. Kodwa-ke, izimpawu zingase zihlale izinsuku ezinyangeni emva kokugcina umuntu edaywe izinwele.
Izizathu Eziningana Ezivamile Zokuphendula Ekugqokeni Izinwele
1. I-Para-Phenylenediamine (PPD). Amakhemikhali enombala wezinwele ikakhulukazi angabangela ukusabela kwe-para-phenylenediamine (PPD).
I-PPD itholakala ezingaphezu kwezingxenye ezimbili kwezintathu zamadayi ezinwele unomphela futhi iphumelela kakhulu ekungeneni i-shaft yezinwele ne-follicle, kanye nokubopha amaprotheni esikhumbeni. Lezi zimpawu zenza i-PPD ibe yinkimbinkimbi yokuxhumana e-antigen ekwazi ukusiza ukubhekana nokugula. Ngenxa yalesi sizathu, amanye amazwe aseYurophu, kuhlanganise neJalimane, eFrance naseSweden, avimbele i-PPD. Izinwele eziningi zezinwele ezibizwa ngokuthi "hypoallergenic" ngeke ziqukathe i-PPD njengesithako.
2. Cobalt. I-Cobalt ingenye ikhemikhali ekhona kwezinye izinwele zezinwele eziyimbangela evamile yokusabela ekubalaleni izinwele zomuntu. Leli khemikhali isebenza ukuhlinzeka nge-pigment ngamanye amakhanda azinwele ezimhlophe aphakathi nendawo. Lokhu ngokuvamile kubangelwa ukungaboni ngaso sonke isikhathi ukusabela ngombala wezinwele, njengoba abantu bangase bacabange ukuthi uma bezwa ukusabela kwombala wezinwele, ukuthi kufanele kube ngumphumela we-PPD. Kodwa-ke, umuntu ophikisana ne-cobalt uzobe esesabela kudayi wezinwele "ze-hypoallergenic" ngoba idayi lezinwele lizobe likhona i-cobalt, kodwa lingekho i-PPD (isizathu esivame kakhulu sokuphendula ngombala wezinwele).
3. I-glyceryl thioglycolate. Leli khemikhali litholakala kwizixazululo ezinganaphakade ezingasetshenziswa ngokubambisana nezinwele zoboya. Njengoba i-glyceryl thioglycolate ingatholakali kuma-panels ajwayelekile ukuhlola i-dermatitis yokuxhumana, i-diagnostic engabhekwa kalula yi-allergenist noma i-dermatologist eyenza ukuhlolwa ngenxa yesibindi sokuxhumana komuntu.
Ngakho-ke, uma umuntu esebenzisa isisombululo sokusika (noma ukuqondisa) izinwele zabo, kanye nombala wezinwele, kubalulekile ukucabangela wonke amakhemikhali angabangela imbangela yomuntu.
4. Cocamidopropyl betaine . I-Cocamidopropyl betaine yisisetshenziswa esithathwe kakhukhunathi esitholakala kuma-shampoos amaningi, amasobho, nemikhiqizo yokugeza. Leli khemikhali lisebenza njenge-surfactant-okusho ukuthi liveza "amabhulebhu" - isici samaspuni amaningi anikezela ngemiphumela yokuhlanza yesepha. Njengoba i-Cocamidopropyl betaine itholakala kuma-shampoos amaningi, kuyisizathu esivame ukushiywa yi-contact dermatitis yobuso.
Futhi, ngoba ama-shampoos kanye neminye imikhiqizo equkethe i-Cocamidopropyl betaine itholakala kwimikhiqizo ye-hairstyling, le makhemikhali ingaba nomthwalo wokuphendula ngemuva kokubala izinwele.
Thola okwengeziwe ngezimbangela , ukuxilongwa ,
> Umthombo:
> McFadden JP, White IR, Frosch PJ, et al. Ukunciphisa Ukudla Kwezinwele. BMJ. 2007; 334: 220.