Ama-blackheads akheka lapho izindlala ze-sebaceous zikhiqiza uwoyela oweqile namaseli esikhumba afile engakhishwa kahle, okwakha umgqomo ekuvulekeni kwepore. Ama-hormone, izakhi zofuzo, izimonyo ezithile, ukubhema, ukudla, kanye nomonakalo wesikhumba (kuhlanganise ne-UV) konke kungafaka isandla kulenqubo.
Ngokwakho, ama-blackheads awanabungozi futhi ikakhulukazi adala ukukhathazeka kwezimonyo nangokwengqondo. Nokho, ama-comedone amaningi angabonisa izinkinga ze-hormonal noma ze-metabolic futhi angathuthuka abe yi-acne evuvukele uma amagciwane ekhula ngaphakathi kwepore evalekile.
Ama-blackheads amancane, ayedwa angakukhathazi avame ukungadingi ukwelashwa futhi angacaca ngokwawo. Ukuze uthole ama-comedone amaningi noma angapheli, ukwelashwa kuvamise ukufaka ukuhlanza okuthambile, ama-exfoliant amakhemikhali (njenge-salicylic acid), ama-retinoid, futhi ngezinye izikhathi kukhishwe ngokomsebenzi noma ama-peels ngaphansi kokuqondisa kodokotela besikhumba noma abacwaningi bezimonyo.