Ma'anar ƙamus na kalmar "hyperpigmentation" shine duhun wani yanki na fata ko kusoshi wanda ya haifar da karuwar samar da melanin. Melanin shine launi da ke ba da launi ga fata, gashi, da idanu. Hyperpigmentation na iya faruwa a cikin ƙananan faci ko rinjayar manyan wurare na jiki kuma sau da yawa ana haifar da shi ta hanyar wuce gona da iri na hasken rana, canjin hormonal, wasu magunguna, ko raunin fata. Yana da wani yanayi na kowa kuma yawanci ba shi da lahani, amma wasu mutane na iya neman magani don dalilai na kwaskwarima ko kuma idan hyperpigmentation alama ce ta yanayin rashin lafiya.