Abantu benshi bakoresha ibitanda byo gusiga ibara ry'uruhu kugira ngo bakomeze kugira ibara ry'uruhu umwaka wose, ariko ikibazo cy'ingenzi cyo gusuzuma ni ukumenya niba ibitanda byo gusiga ibara ry'uruhu ari bibi ku ruhu rwawe. Kimwe n'ubundi buryo bwose bwo kwisiga burimo kwisiga imirasire ya ultraviolet (UV), ibitanda byo gusiga ibara ry'uruhu bifite ibyiza byo kwisiga ndetse n'ingaruka mbi zishobora kubaho. Kumenya ingaruka n'uburyo bwo kuzigabanya bishobora kugufasha gufata ibyemezo birambuye ku bijyanye no gusiga ibara ry'uruhu mu nzu.
Imwe mu mpamvu nyamukuru abantu bakoresha ibitanda byo gusiga ibara ry'uruhu ni ukugira ngo babone ibara ryihuse kandi ringana. Ibitanda byo gusiga ibara ry'uruhu bikoresha imirasire ya UVA ndetse rimwe na rimwe na UVB kugira ngo bitume uruhu rukora melanin. Melanine ni ibara rituma uruhu rwijima. Ariko, imirasire ya UV igira ingaruka no ku ruhu mu bundi buryo, ari nayo mpamvu ingaruka mbi zishobora kubaho iyo gusiga ibara ry'uruhu bidakozwe neza.
Ingaruka z’ibanze zo gutwika ibitanda ni ukubyimbirwa cyane, bishobora gutera ubushye. Gutwika ibitanda bisa n’izuba kandi bishobora gutera ubushye, ububabare, no gushwanyuka. Ibi bikunze kubaho iyo umuntu agumye mu bitanda igihe kirekire cyangwa agahora yijimye kenshi adaha uruhu umwanya uhagije wo gukira.
Ikindi kibazo gikunze kugaragara ni imiterere y'uruhu n'umwuma utaringaniye. Imirasire ya UV ishobora kugabanya ububobere bw'uruhu n'ubushuhe. Uko igihe kigenda gihita, ibi bishobora gutuma uruhu rusa nabi, rwumye, kandi rutoroshye. Niyo mpamvu amazi y'uruhu ari ingenzi cyane ku bantu bakoresha imiterere y'uruhu buri gihe.
Gusaza imburagihe ni kimwe mu byavuzwe cyane ku ngaruka ziterwa no gukaraba uruhu. Imirasire ya UVA yinjira cyane mu ruhu kandi ishobora kwihutisha kwangirika kwa kolajeni. Ibi bishobora gutera iminkanyari, imirongo mito, no gutakaza ubukomere bw'uruhu. Abantu bakunze gukaraba uruhu mu myaka myinshi bakunze kubona ibimenyetso byo gusaza mbere y'abadakoresha udutambaro two gukaraba uruhu.
Uburiri bwo gusiga ibara ry'uruhu bushobora kandi kugira ingaruka ku bantu mu buryo butandukanye bitewe n'ubwoko bw'uruhu rwabo. Abantu bafite uruhu rwera bashobora kugira ubushye no kubabara, mu gihe abantu bafite uruhu rwijimye bashobora kugira ibara ryinshi cyangwa ibara ryinshi mu gihe bakoresha cyane uburiri bwo gusiga ibara ry'uruhu. Gusobanukirwa ubwoko bw'uruhu rwawe no guhindura igihe cyo gusiga ibara ry'uruhu ni ingenzi cyane.
Hariho kandi ingaruka mbi zitazwi cyane, nko kumva amaso adafite uburibwe, kubura amazi mu ruhu, no gucika vuba kw'ibishushanyo mbonera bitewe n'imirasire y'izuba. Iminwa ni ikindi gice gishobora kuma cyangwa kwangirika iyo kidakingiwe mu gihe cyo gusiga ibara ry'uruhu.
Nubwo hari izi ngaruka mbi, ingaruka nyinshi zo gukoresha uruhu mu ruhu ziterwa no gukoresha uruhu rwinshi kuruta uko rwakoreshwa rimwe na rimwe. Gukurikiza amabwiriza akwiye yo gukoresha uruhu bishobora kugabanya cyane ibyago byo kwangirika k'uruhu. Urugero, abatangira bagomba gutangirana n'amasomo magufi, akenshi iminota 5-7, kandi bakagenda bongera igihe cy'amasomo buhoro buhoro uko uruhu rwabo rurushaho kuba ibara ry'uruhu. Ni byiza kandi kugabanya uruhu inshuro nke mu cyumweru aho kurukoresha buri munsi.
Gukoresha amavuta yo kwisiga mu nzu, kunywa amazi ahagije, no kwisiga amazi nyuma ya buri gikorwa cyo kwisiga bishobora gufasha uruhu kuguma rufite ubuzima bwiza no kugabanya ubwumye n'ubushyuhe. Kwambara indorerwamo zirinda uruhu no kurinda ahantu hashobora kwangirika nko mu maso, ku minwa, no kugabanya tatouage nabyo bishobora kugabanya zimwe mu ngaruka ziterwa no kwisiga mu nzu.
Muri make, uburiri bwo gusiga ibara ry’uruhu bushobora kugira ingaruka mbi nko gushya, kuma k’uruhu, gusaza imburagihe, guhindagurika kw’amabara y’uruhu, no kubabara uruhu, cyane cyane iyo bikoreshejwe kenshi cyangwa mu gihe kirekire. Ariko, gusiga ibara ry’uruhu neza, kwita ku ruhu neza, no kurwaza uruhu neza bishobora kugabanya izi ngaruka no kugufasha kugumana uruhu rwiza mu gihe cyo gusiga ibara ry’uruhu.
