Cov lus txhais ntawm cov yam ntxwv ntawm daim tawv nqaij yog peb cov tawv nqaij zoo nkauj.Nws yog nrog los ntawm tib neeg thaum yug los.Nws yog tsim los ntawm undulating daim tawv nqaij grooves thiab daim tawv nqaij crests, uas yog feem ntau ruaj polygons thiab yuav luag unchanged.Saib ncaj qha ntawm daim tawv nqaij liab qab, koj tuaj yeem pom qhov sib txawv, chaotic textures, nrog rau cov plaub hau zoo ntawm hnyav lossis lub teeb xim.Txawm li cas los xij, nrog lub sijhawm dhau los, tib neeg tseem muaj hnub nyoog, thiab daim tawv nqaij kuj maj mam muaj hnub nyoog ib txwm muaj.Nyob rau tib lub sijhawm, daim tawv nqaij uas feem ntau tshwm sim kuj yuav raug kev txom nyem los ntawm lwm yam stimuli xws li ib puag ncig muaj kuab paug, thiab txuas ntxiv raug mob, thiab tus nqi ntawm kev puas tsuaj rau stratum corneum hlwb yuav hloov.Tus naj npawb ntawm daim tawv nqaij grooves thiab daim tawv nqaij ridges hloov, thiab cov duab zoo kuj zoo nkaus li cross-bonded, tus lej txo, thiab thaj chaw saum npoo txuas ntxiv nthuav dav, yog li daim tawv nqaij yuav wrinkled thiab ntxhib.
Feem ntau, ua ntej hnub nyoog 25 xyoos, qhov saum npoo ntawm daim tawv nqaij yog du, ci, thiab elastic.Tom qab ntawd, txawm li cas los xij, daim tawv nqaij pib maj mam thiab cov tsos mob ntawm lub cev feem ntau hloov.
1. Cov tawv nqaij noo noo thiab tawv nqaij barrier
Feem ntau ntawm cov kev tshawb fawb ntawm cov tawv nqaij ntxhib tsom rau kev ua haujlwm ntawm stratum corneum, xws li kev ua haujlwm ntawm dej tuav peev xwm thiab kev ua haujlwm ntawm daim tawv nqaij barrier.Xws li kev tshawb fawb txog kev ya raws, ntuj moisturizing yam, thiab lipid hloov ntawm stratum corneum hlwb.Moisture poob yog qhov hnyav, ua rau daim tawv nqaij ua matted thiab grainy.Kev tshem tawm ntawm cov hlwb epidermal yog qhov tsis zoo, ua rau muaj cov kab mob dandruff thiab nplai.Cov dej noo ntawm daim tawv nqaij yog ze ze rau cov dej noo, luster thiab fineness ntawm daim tawv nqaij.Qhov du, dej ntau dua stratum corneum cuam tshuam tsis tu ncua los tsim kom muaj lub teeb ci ntsa iab, thaum qhuav, scaly stratum corneum qhia txog txoj hauv kev tsis zoo uas ua rau daim tawv nqaij zoo li grey.Nrog cov dej noo tsawg hauv daim tawv nqaij, daim tawv nqaij qhuav thiab ntxhib, thiab daim tawv nqaij du.
Daim tawv nqaij nrog txo kev ua haujlwm yog zoo li lub kaus tawg.Tsis tsuas yog cov dej endogenous evaporate yooj yim, tab sis sab nraud stimuli yog yooj yim rau invade, thiab o kuj tshwm sim.Xws li cov teeb meem ntawm daim tawv nqaij muaj feem xyuam rau o: khaus, roughness, tev, khaus, liab, thiab lwm yam. Cov teeb meem ntawm daim tawv nqaij rov tshwm sim tsis yog los ntawm hom tawv nqaij tab sis los ntawm kev mob ntev ntawm daim tawv nqaij.
Lub photoaging epidermis pom kho thickening thaum qhov kev puas tsuaj me me, thiab atrophy thaum qhov kev puas tsuaj loj heev.Cov hlwb ntawm cov txheej txheem basal tau hloov pauv los ntawm qhov pom tseeb atypia, thiab muaj ntau lub hlwb dyskeratotic.
2. Lub dermis poob nws elasticity
Daim tawv nqaij roughness yog ze ze rau ntawm daim tawv nqaij elasticity.Cov tawv nqaij elasticity txo, daim tawv nqaij laxity los yog wrinkles tshwm, thiab daim tawv nqaij roughness nce.Fibroblasts yog qhov tseem ceeb tshaj plaws ntawm cov cellular tivthaiv nyob rau hauv lub dermis ntawm daim tawv nqaij thiab ua lub luag haujlwm tseem ceeb hauv kev sib txuas ntawm secretory fibers thiab extracellular matrix.Nws ua lub luag haujlwm tseem ceeb hauv kev kho cov ntaub so ntswg.Nrog lub hnub nyoog, lub thickness ntawm daim tawv nqaij txo qis raws li elastic fiber cov ntsiab lus nyob rau hauv daim tawv nqaij maj mam txo.Kev laus ntawm daim tawv nqaij yog qhov tseem ceeb, uas tuaj yeem pom tau tias yog tawv nqaij qhuav thiab ntxhib, nce thiab tob wrinkles, xoob ntawm daim tawv nqaij, thiab txo elasticity.Lub hnub nyoog yog nrog los ntawm kev txo qis ntawm daim tawv nqaij cov ntsiab lus ntawm cov protein, tsis muaj firmness ntawm daim tawv nqaij, thiab nce qhov tob ntawm daim tawv nqaij zoo nkauj ua rau cov tsos ntawm wrinkles.
Yog li ua ntej cov teeb meem ntawm daim tawv nqaij tsim, peb tseem muaj ntau yam ua.Piv txwv li, lubdaim tawv nqaij analyzertuaj yeem pab peb qeeb lossis daws cov teeb meem ntawm daim tawv nqaij mus rau qee qhov ua ntej cov teeb meem ntawm daim tawv nqaij tshwm sim!
Post lub sij hawm: Oct-12-2022
