Macnaha qaamuuska ereyga "dalaga-dalaga" waxa uu tilmaamayaa in gabi ahaanba ama khasaaraha weyn ee dalagyada beeraha ay sababeen arrimo kala duwan oo hortaagan koriimadooda iyo horumarkooda. Waxay dhacdaa marka wax-soo-saarka la filayo ama wax-soo-saarka dalaggu uu aad uga hooseeyo heerka la filayo ama la rabo. Dalag-la'aanta waxaa sababi kara arrimo kala duwan, oo ay ku jiraan xaaladaha cimilada xun (sida abaarta, roobka xad-dhaafka ah, dhaxan, ama roobdhagaxyaalaha), cayayaannada, cudurrada dhirta, nafaqo-xumada, ama arrimo kale oo deegaanka ah. Natiijadii ka dhalata wax-soo-saarka dalaggu waa dalaggii oo yaraada ama waayista dalaggii oo dhan, taasoo cawaaqib xun ku yeelan karta beeralayda, saadka cuntada, iyo dhaqaalaha guud ee deegaan ama gobol.