1) Daim tawv nqaij zais cia
Cov kev hloov ntawm cov xim ntawm daim tawv nqaij yog feem ntau cuam tshuam los ntawm peb yam hauv qab no.
1. Cov ntsiab lus thiab kev faib tawm ntawm ntau yam xim hauv daim tawv nqaij cuam tshuam rau eumelanin: qhov no yog cov xim tseem ceeb uas txiav txim siab qhov tob ntawm cov xim ntawm daim tawv nqaij, thiab nws cov concentration ncaj qha cuam tshuam rau qhov ci ntawm daim tawv nqaij. Ntawm cov neeg dub, melanin granules yog loj thiab densely faib; Ntawm cov neeg Esxias thiab Caucasians, nws yog me dua thiab ntau dua. Pheomelanin: muab cov tawv nqaij daj rau xim liab. Nws cov ntsiab lus thiab kev faib tawm txiav txim siab lub suab sov thiab txias ntawm cov xim ntawm cov tawv nqaij, piv txwv li, Asians feem ntau muaj cov ntsiab lus ntawm xim av melanin. Carotenoids thiab flavonoids: Cov no yog exogenous pigments tau los ntawm kev noj haus, xws li carrots, taub dag, thiab lwm yam khoom noj uas nplua nuj nyob rau hauv beta carotene, uas muaj peev xwm ntxiv daj rau txiv kab ntxwv hue rau ntawm daim tawv nqaij.
2. Cov ntsiab lus ntawm hemoglobin nyob rau hauv cov ntshav ntawm daim tawv nqaij yog hu ua Oxyhemoglobin: Oxyhemoglobin, uas yog xim liab ci thiab nplua nuj nyob rau hauv daim tawv nqaij, tuaj yeem ua rau daim tawv nqaij zoo nkauj thiab noj qab nyob zoo. Deoxyhemoglobin: Tsis muaj oxygenated hemoglobin tshwm tsaus liab lossis ntshav liab, thiab thaum nws qhov kev faib ua feem hauv cov ntshav siab, daim tawv nqaij yuav daj ntseg.
3. Ntxiv rau lwm yam, cov xim ntawm daim tawv nqaij kuj cuam tshuam los ntawm cov ntshav ncig, oxidative kev nyuaj siab, qib tshuaj hormones, thiab ib puag ncig yam xws li UV raug. Piv txwv li, hluav taws xob ultraviolet nkoos melanocytes los tsim ntau melanin los tiv thaiv daim tawv nqaij los ntawm kev puas tsuaj.
2) Tsis pub leejtwg paub ntawm pigmentation
Stains, kev kho mob hu ua pigmentation lesions, yog ib qho tshwm sim ntawm kev tsaus ntuj ntawm daim tawv nqaij xim. Lawv tuaj yeem muaj cov duab sib txawv, qhov ntau thiab tsawg, thiab xim, thiab muaj ntau yam keeb kwm.
Stains tuaj yeem muab faib ua ob hom hauv qab no:
Freckles: feem ntau me me, zoo-txhais, sib dua xim xim av me ntsis uas feem ntau tshwm sim ntawm lub ntsej muag thiab lwm qhov chaw ntawm daim tawv nqaij feem ntau raug tshav ntuj.
Sunspots lossis Hnub nyoog me ntsis: Cov pob no loj, muaj xim ntawm xim av mus rau xim dub, thiab feem ntau pom ntawm lub ntsej muag, tes, thiab lwm qhov chaw ntawm cov hnub nyoog nruab nrab thiab cov neeg laus uas tau raug tshav ntuj ntev.
Melasma, tseem hu ua "pob txha mos," feem ntau nthuav tawm raws li qhov sib txawv xim av xim av ntawm lub ntsej muag uas cuam tshuam nrog kev hloov pauv hauv cov tshuaj hormones.
Post inflammatory hyperpigmentation (PIH): Qhov no yog pigmentation tsim los ntawm cov pigmentation ntau dua tom qab o, feem ntau pom tom qab pob txuv lossis tawv nqaij puas lawm.
Cov yam ntxwv ntawm caj ces ua rau muaj kev tsim cov pigmentation: Qee hom pigmentation, xws li freckles, muaj qhov tseeb ntawm tsev neeg caj ces predisposition. Kev raug ultraviolet: Ultraviolet hluav taws xob yog lub ntsiab ua rau ntau yam pigmentation, tshwj xeeb tshaj yog tshav ntuj thiab melasma. Cov tshuaj hormones: Kev xeeb tub, tshuaj tiv thaiv kab mob, lossis kab mob endocrine tuaj yeem ua rau muaj kev hloov pauv hauv cov tshuaj hormones, ua rau muaj kev loj hlob ntawm melasma. Inflamation: Txhua yam uas ua rau cov tawv nqaij o, xws li pob txuv, raug mob, lossis kev tsis haum tshuaj, tuaj yeem ua rau muaj xim pigmentation. Cov tshuaj phiv tshuaj: Qee cov tshuaj, xws li qee yam tshuaj tiv thaiv kab mob thiab tshuaj tua kab mob, tuaj yeem ua rau cov pigment deposition. Cov xim ntawm daim tawv nqaij: Cov neeg uas muaj cov tawv nqaij tsaus nti yog qhov ua rau cov pigmentation ntau dhau.
Post lub sij hawm: Dec-12-2024
