{"id":39821,"date":"2021-01-05T20:48:45","date_gmt":"2021-01-06T01:48:45","guid":{"rendered":"https:\/\/pro.dermalogica.ca\/article\/the-science-of-dark-spots\/"},"modified":"2021-01-05T20:48:45","modified_gmt":"2021-01-06T01:48:45","slug":"the-science-of-dark-spots","status":"publish","type":"article","link":"https:\/\/pro.dermalogica.ca\/fr\/article\/the-science-of-dark-spots\/","title":{"rendered":"the science of dark spots"},"content":{"rendered":"<h2>la science des taches brunes<\/h2>\n<p>Mais qu&rsquo;est-ce qui provoque les taches brunes ? Parfois, en r\u00e9ponse \u00e0 divers facteurs internes ou externes, la peau produit des quantit\u00e9s irr\u00e9guli\u00e8res de m\u00e9lanine, ce qui entra\u00eene la formation d&rsquo;amas de couleur \u00e0 la surface de la peau. Cette surproduction est \u00e0 l&rsquo;origine des taches brunes. La section suivante examine les facteurs d\u00e9clenchants de l&rsquo;hyperpigmentation, l&rsquo;anatomie d&rsquo;une tache brune et la meilleure fa\u00e7on de la traiter.   <\/p>\n<p><strong>Quelles sont les causes des taches sombres ?<\/strong><\/p>\n<p>Bien que la m\u00e9lanine prot\u00e8ge naturellement nos cellules, la peau produit parfois de la m\u00e9lanine en exc\u00e8s. Cette surproduction de m\u00e9lanine est \u00e0 l&rsquo;origine des taches brunes, \u00e9galement appel\u00e9es hyperpigmentation. Voici quelques-uns des principaux facteurs d\u00e9clenchant l&rsquo;apparition de taches brunes :  <\/p>\n<p><strong>Rayons UV<\/strong><\/p>\n<p>L&rsquo;exposition au soleil sans protection est le d\u00e9clencheur le plus connu de la production de m\u00e9lanine (pensez au bronzage que vous obtenez apr\u00e8s une journ\u00e9e \u00e0 la plage). C&rsquo;est \u00e9galement la principale cause des taches sombres ; la plupart des hyperpigmentations que nous traitons sont le r\u00e9sultat de l&rsquo;exposition au soleil. Heureusement, l&rsquo;hyperpigmentation induite par les UV est largement consid\u00e9r\u00e9e comme le type d&rsquo;hyperpigmentation le plus facile \u00e0 traiter.  <\/p>\n<p><strong>pollution<\/strong><\/p>\n<p>Les particules en suspension dans l&rsquo;air et les hydrocarbures aromatiques polycycliques (HAP) peuvent se loger dans la structure profonde de la peau. Cela oxyde les tissus environnants, ce qui entra\u00eene des dommages caus\u00e9s par les radicaux libres et d\u00e9clenche une r\u00e9ponse inflammatoire qui se traduit par une hyperpigmentation. <\/p>\n<p><strong>radicaux libres<\/strong><\/p>\n<p>Connus collectivement sous le nom d&rsquo;esp\u00e8ces r\u00e9actives de l&rsquo;oxyg\u00e8ne (ROS), les radicaux libres sont des mol\u00e9cules d\u00e9riv\u00e9es de l&rsquo;oxyg\u00e8ne avec des \u00e9lectrons non appari\u00e9s, ce qui les rend tr\u00e8s r\u00e9actifs et capables d&rsquo;endommager les macromol\u00e9cules telles que les lipides, les prot\u00e9ines et les acides nucl\u00e9iques. Les radicaux libres produits par les k\u00e9ratinocytes peuvent surstimuler les m\u00e9lanocytes, ce qui entra\u00eene une hyperpigmentation. <\/p>\n<p><strong>hormones<\/strong><\/p>\n<p>Pendant la grossesse, on observe souvent un m\u00e9lasma, \u00e9galement appel\u00e9 chloasma ou \u00ab\u00a0masque de grossesse\u00a0\u00bb, sur le visage. Ce ph\u00e9nom\u00e8ne, qui peut \u00eatre temporaire ou permanent, est caus\u00e9 par les changements hormonaux survenant au cours de la grossesse. M\u00eame des m\u00e9dicaments tels que les contraceptifs peuvent induire des taches sombres d&rsquo;origine hormonale.  <\/p>\n<p><strong>l&rsquo;inflammation<\/strong><\/p>\n<p>Tout traumatisme de la peau, qu&rsquo;il s&rsquo;agisse d&rsquo;une blessure, d&rsquo;une \u00e9ruption cutan\u00e9e ou m\u00eame d&rsquo;une proc\u00e9dure m\u00e9dicale telle que le resurfa\u00e7age ou l&rsquo;\u00e9pilation au laser, peut endommager les m\u00e9lanocytes et les surstimuler, ce qui entra\u00eene une hyperpigmentation post-inflammatoire (HPI). Les peaux fonc\u00e9es sont particuli\u00e8rement sensibles \u00e0 ce type d&rsquo;hyperpigmentation. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>la science des taches brunes Mais qu&rsquo;est-ce qui provoque les taches brunes ? Parfois, en r\u00e9ponse \u00e0 divers facteurs internes ou externes, la peau produit des quantit\u00e9s irr\u00e9guli\u00e8res de m\u00e9lanine, ce qui entra\u00eene la formation d&rsquo;amas de couleur \u00e0 la surface de la peau. Cette surproduction est \u00e0 l&rsquo;origine des taches brunes. La section suivante [&hellip;]<\/p>\n","protected":false},"featured_media":38213,"template":"","article_category":[22],"class_list":["post-39821","article","type-article","status-publish","has-post-thumbnail","hentry","article_category-pigmentation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>the science of dark spots - Dermalogica Canada PRO<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez la science des taches sombres et leurs causes dans la peau.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pro.dermalogica.ca\/fr\/article\/the-science-of-dark-spots\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"the science of dark spots - Dermalogica Canada PRO\" \/>\n<meta property=\"og:description\" content=\"D\u00e9couvrez la science des taches sombres et leurs causes dans la peau.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pro.dermalogica.ca\/fr\/article\/the-science-of-dark-spots\/\" \/>\n<meta property=\"og:site_name\" content=\"Dermalogica Canada PRO\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pro.dermalogica.ca\/wp-content\/uploads\/2021\/01\/605152609_pro.dermalogica_Pigmentation-1-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"969\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/pro.dermalogica.ca\/fr\/article\/the-science-of-dark-spots\/\",\"url\":\"https:\/\/pro.dermalogica.ca\/fr\/article\/the-science-of-dark-spots\/\",\"name\":\"the science of dark spots - 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