{"id":11479,"date":"2026-06-15T18:19:07","date_gmt":"2026-06-15T16:19:07","guid":{"rendered":"https:\/\/www.adacyte.com\/ulcerative-colitis-and-skin-conditions\/"},"modified":"2026-07-28T19:32:58","modified_gmt":"2026-07-28T17:32:58","slug":"ulcerative-colitis-and-skin-conditions","status":"publish","type":"post","link":"https:\/\/www.adacyte.com\/fr\/ulcerative-colitis-and-skin-conditions\/","title":{"rendered":"Rectocolite h\u00e9morragique et affections cutan\u00e9es"},"content":{"rendered":"<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Rectocolite h\u00e9morragique et affections cutan\u00e9es : comprendre le lien entre l&rsquo;intestin et la peau<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>La <strong>rectocolite h\u00e9morragique<\/strong>&nbsp;(<strong>RCH<\/strong>) est une <strong>maladie inflammatoire chronique de l&rsquo;intestin<\/strong>&nbsp;(<strong>MICI<\/strong>) qui touche principalement le c\u00f4lon, mais ses effets ne se limitent pas uniquement au syst\u00e8me digestif. En raison de la nature syst\u00e9mique de l&rsquo;inflammation, de nombreuses personnes atteintes de RCH peuvent d\u00e9velopper des sympt\u00f4mes en dehors de l&rsquo;intestin, connus sous le nom de <em>manifestations extra-intestinales<\/em>&nbsp;(MEI). Selon la litt\u00e9rature scientifique, jusqu&rsquo;\u00e0 50 % des patients atteints de MICI pr\u00e9sentent un type de manifestation extra-intestinale, les affections cutan\u00e9es et articulaires \u00e9tant les plus fr\u00e9quentes.<sup>1,2<\/sup><\/p>\n<\/div>\n\n<div class=\"wp-block-image\"><div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.adacyte.com\/wp-content\/uploads\/2026\/06\/image3.png\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>De nombreuses personnes sont surprises de d\u00e9couvrir qu&rsquo;une pouss\u00e9e de rectocolite h\u00e9morragique peut \u00e9galement se manifester sur la peau par des l\u00e9sions, des ulc\u00e8res, des rougeurs ou des \u00e9ruptions cutan\u00e9es persistantes. Cependant, la science a d\u00e9montr\u00e9 qu&rsquo;il existe un lien direct entre l&rsquo;intestin et la peau, connu sous le nom d&rsquo;axe intestin-peau.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>L&rsquo;axe intestin-peau : quel est le lien entre le microbiote intestinal et la peau ?<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Les recherches les plus r\u00e9centes d\u00e9montrent que le microbiote intestinal et le syst\u00e8me immunitaire cutan\u00e9 entretiennent une communication constante et bidirectionnelle.<sup>3<\/sup>&nbsp;Ce ph\u00e9nom\u00e8ne est connu sous le nom d&rsquo;<strong>axe intestin-peau<\/strong>&nbsp;et explique comment les d\u00e9s\u00e9quilibres intestinaux peuvent d\u00e9clencher une inflammation cutan\u00e9e.<sup>4<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Lorsque le microbiote intestinal perd son \u00e9quilibre, par exemple en raison du stress, d&rsquo;antibiotiques, d&rsquo;infections ou de certains modes d&rsquo;alimentation, le syst\u00e8me immunitaire peut s&rsquo;activer de mani\u00e8re excessive et produire une inflammation syst\u00e9mique.<sup>5 <\/sup>Cette inflammation touche non seulement le c\u00f4lon, mais aussi d&rsquo;autres organes, y compris la peau.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>De plus, des \u00e9tudes r\u00e9centes publi\u00e9es dans <em>Nature Communications<\/em>&nbsp;montrent que certaines alt\u00e9rations immunitaires et microbiennes peuvent modifier simultan\u00e9ment la fonction intestinale et la r\u00e9ponse immunitaire cutan\u00e9e, renfor\u00e7ant l&rsquo;id\u00e9e que l&rsquo;intestin et la peau fonctionnent comme des organes \u00e9troitement li\u00e9s.<sup>6<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Ce m\u00eame m\u00e9canisme est \u00e9galement observ\u00e9 dans les allergies alimentaires. Dans ces cas, le syst\u00e8me immunitaire identifie \u00e0 tort certaines prot\u00e9ines alimentaires comme dangereuses et lib\u00e8re des m\u00e9diateurs inflammatoires qui peuvent produire des sympt\u00f4mes digestifs et cutan\u00e9s, tels que des vomissements, des d\u00e9mangeaisons ou des \u00e9ruptions cutan\u00e9es.<sup>4<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Comment savoir si une l\u00e9sion cutan\u00e9e est li\u00e9e \u00e0 une MICI ?<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Toutes les \u00e9ruptions cutan\u00e9es chez les personnes atteintes de rectocolite h\u00e9morragique ne sont pas li\u00e9es \u00e0 une maladie inflammatoire chronique de l&rsquo;intestin. Le professeur <strong>Shomron Ben-Horin<\/strong>, chef du <em>service de gastro-ent\u00e9rologie du centre m\u00e9dical Sheba<\/em>&nbsp;et expert international des MICI, explique que de nombreux patients confondent des \u00e9ruptions cutan\u00e9es courantes ou temporaires avec des manifestations extra-intestinales.<sup>7<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Selon le Pr Ben-Horin, la plupart des l\u00e9sions cutan\u00e9es associ\u00e9es aux MICI ont tendance \u00e0 :<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<ul class=\"wp-block-list\">\n<li>Co\u00efncider avec une pouss\u00e9e active de la maladie intestinale.<\/li>\n\n\n\n<li>Persister pendant plusieurs jours ou semaines.<\/li>\n\n\n\n<li>Pr\u00e9senter une inflammation ou une douleur \u00e9vidente.<\/li>\n<\/ul>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>En revanche, une \u00e9ruption cutan\u00e9e l\u00e9g\u00e8re qui appara\u00eet pendant un ou deux jours et dispara\u00eet spontan\u00e9ment n&rsquo;est probablement pas li\u00e9e \u00e0 la rectocolite h\u00e9morragique.<sup>7<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Principales affections cutan\u00e9es associ\u00e9es \u00e0 la rectocolite h\u00e9morragique <sup>1,2,8<\/sup><\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>\u00c9ryth\u00e8me noueux<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>L&rsquo;<strong>\u00e9ryth\u00e8me noueux<\/strong>&nbsp;est l&rsquo;une des manifestations cutan\u00e9es les plus fr\u00e9quentes chez les patients atteints de RCH.<sup>9<\/sup>&nbsp;Il se caract\u00e9rise par l&rsquo;apparition de nodules rouge\u00e2tres, sur\u00e9lev\u00e9s, chauds et douloureux au toucher et \u00e0 la marche (plus douloureux qu&rsquo;intens\u00e9ment d\u00e9mangeants), palpables, sensibles et de couleur rouge-violet. Ils apparaissent g\u00e9n\u00e9ralement de mani\u00e8re bilat\u00e9rale sur les jambes, bien qu&rsquo;ils puissent \u00e9galement toucher les cuisses, les bras, les fesses ou le tronc. Les nodules mesurent g\u00e9n\u00e9ralement entre 1 et 5 cm et changent de couleur avec le temps, prenant des teintes semblables \u00e0 celles des h\u00e9matomes avant de dispara\u00eetre.<\/p>\n<\/div>\n\n<div class=\"wp-block-image\"><div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.adacyte.com\/wp-content\/uploads\/2026\/06\/image2.jpg\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>De plus, on estime qu&rsquo;entre 5 % et 10 % des patients atteints de RCH en feront l&rsquo;exp\u00e9rience \u00e0 un moment donn\u00e9 de leur maladie.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Dans la plupart des cas, l&rsquo;\u00e9ryth\u00e8me noueux appara\u00eet lors d&rsquo;une pouss\u00e9e intestinale et s&rsquo;am\u00e9liore lorsque l&rsquo;inflammation digestive est contr\u00f4l\u00e9e. Plus de 80 % des patients r\u00e9pondent favorablement au traitement par cortico\u00efdes ou m\u00e9dicaments anti-TNF.<sup>7,9<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Pyoderma gangrenosum<\/strong><\/h3>\n<\/div>\n\n<div class=\"wp-block-image\"><div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.adacyte.com\/wp-content\/uploads\/2026\/06\/image1.jpg\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Le pyoderma gangrenosum est une complication beaucoup moins fr\u00e9quente, touchant moins de 1 % des patients, mais elle est consid\u00e9rablement plus s\u00e9v\u00e8re.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Cette affection provoque des ulc\u00e8res cutan\u00e9s douloureux qui peuvent se d\u00e9velopper rapidement.<sup>10<\/sup>&nbsp;Elle commence souvent par une petite l\u00e9sion semblable \u00e0 une plaie ou une ampoule et \u00e9volue vers un ulc\u00e8re profond de plusieurs centim\u00e8tres de large aux bords violac\u00e9s ou bleut\u00e9s, fr\u00e9quemment sur les jambes, bien qu&rsquo;elle puisse appara\u00eetre n&rsquo;importe o\u00f9 sur le corps ou autour de plaies chirurgicales, n&rsquo;importe o\u00f9 sur le corps ou autour de sites chirurgicaux. Les l\u00e9sions peuvent fusionner s&rsquo;il y a plusieurs ulc\u00e8res et laissent g\u00e9n\u00e9ralement des cicatrices apr\u00e8s la gu\u00e9rison. Les patients peuvent \u00e9galement ressentir une douleur intense et, dans certains cas, un inconfort articulaire.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Contrairement \u00e0 l&rsquo;\u00e9ryth\u00e8me noueux, le pyoderma gangrenosum ne co\u00efncide pas toujours avec une pouss\u00e9e intestinale et peut appara\u00eetre apr\u00e8s un traumatisme cutan\u00e9 mineur ou une intervention chirurgicale (un ph\u00e9nom\u00e8ne connu sous le nom de pathergie).<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Le Pr Ben-Horin souligne que cette affection n\u00e9cessite une attention m\u00e9dicale urgente, bien qu&rsquo;elle r\u00e9ponde g\u00e9n\u00e9ralement bien aux cortico\u00efdes, aux agents anti-TNF ou \u00e0 la ciclosporine.<sup>7<\/sup>&nbsp;Le traitement est habituellement efficace, bien que les ulc\u00e8res puissent laisser des cicatrices et qu&rsquo;il existe un risque d&rsquo;apparition de nouvelles l\u00e9sions dans d&rsquo;autres zones. Un d\u00e9pistage pr\u00e9coce et une prise en charge appropri\u00e9e sont essentiels pour r\u00e9duire les complications, soulager la douleur et am\u00e9liorer la qualit\u00e9 de vie du patient.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Vascularite<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>La vascularite est une inflammation des vaisseaux sanguins qui peut se manifester sur la peau sous forme de l\u00e9sions rouge\u00e2tres ou violac\u00e9es de diff\u00e9rentes tailles.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Bien qu&rsquo;elle ne soit pas consid\u00e9r\u00e9e comme une manifestation extra-intestinale classique des MICI, les patients atteints de rectocolite h\u00e9morragique ont une plus grande pr\u00e9disposition \u00e0 d\u00e9velopper des troubles auto-immuns concomitants, y compris la vascularite.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Parfois, cette r\u00e9action peut \u00eatre li\u00e9e \u00e0 des infections virales ou m\u00eame \u00e0 certains m\u00e9dicaments utilis\u00e9s pour traiter les MICI.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>La plupart des l\u00e9sions ne sont pas douloureuses au d\u00e9but, mais la vascularite peut \u00e9voluer vers des complications s\u00e9v\u00e8res si elle n&rsquo;est pas trait\u00e9e correctement. Par cons\u00e9quent, il est recommand\u00e9 de consulter un m\u00e9decin ou de se rendre rapidement aux urgences en cas de doute.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Quand consulter un m\u00e9decin ? <sup>7<\/sup><\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Si vous souffrez de rectocolite h\u00e9morragique et remarquez l&rsquo;apparition de :<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<ul class=\"wp-block-list\">\n<li>Pustules ou l\u00e9sions douloureuses.<\/li>\n\n\n\n<li>Ulc\u00e8res cutan\u00e9s.<\/li>\n\n\n\n<li>Nodules rouge\u00e2tres persistants.<\/li>\n\n\n\n<li>L\u00e9sions qui s&rsquo;aggravent lors d&rsquo;une pouss\u00e9e intestinale.<\/li>\n<\/ul>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>il est important de consulter un dermatologue ou un gastro-ent\u00e9rologue.<sup>1,11<\/sup><\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>Toutes les \u00e9ruptions cutan\u00e9es ne sont pas li\u00e9es aux MICI. Cependant, si une l\u00e9sion ne dispara\u00eet pas dans un d\u00e9lai de 1 \u00e0 3 jours, s&rsquo;aggrave progressivement ou s&rsquo;accompagne de douleurs, d&rsquo;inflammation ou de fi\u00e8vre, il est conseill\u00e9 de consulter un m\u00e9decin.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<h3 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h3>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>La rectocolite h\u00e9morragique est bien plus qu&rsquo;une maladie intestinale. Le lien entre l&rsquo;intestin, le syst\u00e8me immunitaire et la peau d\u00e9montre que l&rsquo;inflammation syst\u00e9mique peut se manifester dans diff\u00e9rentes parties du corps. Comprendre le fonctionnement de l&rsquo;axe intestin-peau permet non seulement de reconna\u00eetre plus t\u00f4t les manifestations cutan\u00e9es, mais aussi de comprendre l&rsquo;importance de maintenir l&rsquo;inflammation intestinale sous contr\u00f4le.<\/p>\n<\/div>\n\n<div class=\"post-content max-w-987 mx-auto px-20 lg:px-0\">\n<p>La bonne nouvelle est que bon nombre de ces affections cutan\u00e9es r\u00e9pondent favorablement \u00e0 un traitement appropri\u00e9 et au contr\u00f4le de l&rsquo;activit\u00e9 inflammatoire de la maladie. Les d\u00e9tecter t\u00f4t et consulter des professionnels sp\u00e9cialis\u00e9s peut faire une grande diff\u00e9rence dans la qualit\u00e9 de vie des personnes atteintes de MICI.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Rectocolite h\u00e9morragique et affections cutan\u00e9es : comprendre le lien entre l&rsquo;intestin et la peau La rectocolite h\u00e9morragique&nbsp;(RCH) est une maladie inflammatoire chronique de l&rsquo;intestin&nbsp;(MICI) qui touche principalement le c\u00f4lon, mais ses effets ne se limitent pas uniquement au syst\u00e8me digestif. En raison de la nature syst\u00e9mique de l&rsquo;inflammation, de nombreuses personnes atteintes de RCH peuvent [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":11466,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[642],"tags":[],"class_list":["post-11479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveautes"],"acf":{"h_removemb":false,"imgs":{"img_desktop":11466,"img_mobile":11461},"text_above_title":"","description":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Rectocolite h\u00e9morragique et affections cutan\u00e9es - Adacyte<\/title>\n<meta name=\"description\" content=\"Inflammatory Bowel Disease (IBD), including both Crohn\u2019s disease and ulcerative colitis, can prevent us frommaintaining an exercise routine due to the symptoms it causes: abdominal pain, fatigue, or diarrhea makenormal body movement difficult, leading many patients to avoid any type of training.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.adacyte.com\/fr\/ulcerative-colitis-and-skin-conditions\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rectocolite h\u00e9morragique et affections cutan\u00e9es - 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