1) Chakavanzika cheGanda
Kuchinja kweruvara rweganda kunonyanya kukonzerwa nezvinhu zvitatu zvinotevera.
1. Zvinyorwa uye kugoverwa kwemavara akasiyana-siyana muganda kunobata eumelanin: iyi ndiyo huru pigment inosarudza kudzika kwemavara eganda, uye kusungirirwa kwayo kunobata zvakananga kupenya kweganda. Pakati pevanhu vatema, melanin granules yakakura uye yakapararira; Pakati peAsia neCaucasus, idiki uye yakapararira. Pheomelanin: inopa ganda reyero kune tsvuku ruvara toni. Izvo zvirimo uye kugovera zvinosarudza inodziya uye inotonhorera toni yeruvara rweganda, semuenzaniso, maAsia kazhinji ane yakakwira yebrown melanin. Carotenoids uye flavonoids: Aya ndiwo exogenous pigments anobva mukudya, semakarotsi, manhanga, uye zvimwe zvekudya zvakapfuma mu beta carotene, izvo zvinogona kuwedzera yeyero kune orenji hue paganda.
2. Zvinyorwa zve hemoglobin muropa reganda zvinonzi Oxyhemoglobin: Oxyhemoglobin, iyo inopenya ruvara rutsvuku uye yakawanda muganda, inogona kuita kuti ganda rive rakajeka uye rine utano. Deoxyhemoglobin: Non oxygenated hemoglobin inoratidzika yakasviba tsvuku kana yepepuru, uye kana chikamu chayo muropa chakakwira, ganda rinogona kuoneka rakachenuruka.
3. Mukuwedzera kune zvimwe zvinhu, ruvara rweganda runokonzerwawo nekutenderera kweropa, oxidative stress, hormone levels, uye zvakatipoteredza zvakadai seUV exposure. Semuenzaniso, ultraviolet radiation inokurudzira melanocytes kuti ibudise melanin yakawanda kudzivirira ganda kubva mukukuvadzwa.
2) Chakavanzika chemavara
Mavara, anozivikanwa mukurapa sepigmentation maronda, chiitiko chekusviba kwenzvimbo kweruvara rweganda. Dzinogona kuva nemhando dzakasiyana, hukuru, uye mavara, uye dzine mavambo akasiyana.
Mavara anogona kupatsanurwa zvakaenzana mumhando dzinotevera:
Freckles: kazhinji madiki, anonyatso tsanangurwa, akareruka mavara ebrown mavara anonyanya kuoneka pachiso uye dzimwe nzvimbo dzeganda dzinowanzo kuratidzwa nechiedza chezuva.
Sunspots kana Age spots: Aya mavara akakura, kubva muruvara rwebrown kusvika kune dema, uye anowanzo kuwanikwa pachiso, maoko, uye dzimwe nzvimbo dzevanhu vezera repakati uye vachembera avo vakatarisana nechiedza chezuva kwenguva yakareba.
Melasma, inozivikanwawo se "makwapa epamuviri," anowanzo kuratidza symmetrical rima dzvuku zvigamba kumeso zvine chekuita nekuchinja kwemazinga ehomoni.
Post inflammatory hyperpigmentation (PIH): Iyi i pigmentation yakaumbwa nekuda kwekuwedzera pigment deposition mushure mekuzvimba, inowanzoonekwa mushure mekukuvadzwa kwemburwa kana ganda rapora.
Genetic factors dzinoita kuti pave neruvara rweruvara rwemavara: Mamwe marudzi eruvara rweruvara rweganda, senge freckles, ane akajeka emhuri genetic predisposition. Ultraviolet exposure: Ultraviolet mwaranzi ndiyo honzeri huru yeakasiyana pigmentation, kunyanya sunspots uye melasma. Mahomoni mazinga: Kubata pamuviri, zvinodhaka zvekudzivirira pamuviri, kana zvirwere zve endocrine zvinogona kukonzera kuchinja kwemazinga ehomoni, zvichiita kuti kukura kwe melasma. Kuzvimba: Chero chinhu chinokonzera kuzvimba kweganda, senge mburwa, trauma, kana allergic reaction, inogona kukonzeresa post inflammatory pigmentation. Zvinodhaka: Mimwe mishonga, yakadai semimwe mishonga inodzivirira marariya uye chemotherapy, inogona kukonzera pigment kuiswa. Rudzi rweganda: Vanhu vane ganda rakasvibira vanowanzo wedzera pigmentation.
Nguva yekutumira: Zvita-12-2024
