Chloasma nindwara isanzwe yisoni zuruhu mubikorwa byubuvuzi. Ahantu ahabereye mu bagore bafite abana gusa, kandi barashobora kandi kugaragara mubantu badazwi. Irangwa na pigment ligmentation kumatama, agahanga n'umusaya, cyane cyane muburyo bwamababa yikigoga. Umuhondo wumuhondo cyangwa umucyo wijimye, uremereye wijimye cyangwa umukara wumukara.
Hafi y'amoko yose n'amoko mato birashobora guteza imbere indwara, ahubwo ni ahantu hamwe na UV yakundaga uv, nka Amerika y'Epfo, Aziya, na Afurika, bafite iki kibazo cyo hejuru. Benshi mu barwayi bakura indwara mu myaka 30 na 40, kandi abantu bafite imyaka 40 na 50 ni 14% na 16%. Abantu bafite uruhu rworoheje bakura mu matama yo mu ntangiriro, uruhu rwijimye rutera imbere nyuma, na nyuma yo gucura. Ubushakashatsi bwaturutse mu baturage bato muri Amerika y'Epfo bwerekana ko ari abantu 4% kugeza 10%, 50% mu bagore batwite na 10% mu bagabo.
Ukurikije ikwirakwizwa rya ACT, Melasma irashobora kugabanywamo ubwoko 3 bwa kavukire, harimo hagati (irimo agahanga, ibipimo by'izuru, n'ibiciro by'izuru ni 65%, 20%, na 15%. Byongeye kandi, indwara zimwe zindwara zuruhu, nkadiopathic zuruhu rwanyuma, zitekerezwa hamwe na melasma. Ukurikije icyerekezo cya Melanin muruhu, Melasma irashobora kugabanywamo ubwoko bwa epidermal, ubwoko bwa dermal kandi buvanze, muburyo bwa epidermal nubwoko bukunze kugaragara, kandi ubwoko butandukanye nibyo bishoboka cyane,Itara ry'imbahoifasha kumenya ubwoko bwubuvukire. Muri bo, ubwoko bwa epidermal ni igihu cyijimye munsi yumucyo wimbaho; Ubwoko bwa dermal ni imvi zoroheje cyangwa umucyo munsi yijisho ryambaye ubusa, kandi itandukaniro ntabwo rigaragara munsi yumucyo wimbaho. Kwitondera neza melasma ni ingirakamaro guhitamo kwivuza nyuma.
Igihe cya nyuma: Gicurasi-06-2022
