{"id":120858,"date":"2026-09-30T20:45:00","date_gmt":"2026-09-30T23:45:00","guid":{"rendered":"https:\/\/www.tuasaude.com\/news\/?p=120858"},"modified":"2026-09-30T20:45:00","modified_gmt":"2026-09-30T23:45:00","slug":"dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulacao-muda-de-repente","status":"publish","type":"post","link":"https:\/\/www.tuasaude.com\/news\/2026\/09\/30\/dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulacao-muda-de-repente\/","title":{"rendered":"Dedos ficam brancos ou arroxeados no frio: por que a circula\u00e7\u00e3o muda de repente"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Quando os <strong>dedos ficam brancos no frio<\/strong> e depois podem adquirir um tom azulado ou avermelhado, uma possibilidade \u00e9 o fen\u00f4meno de Raynaud. Nessa condi\u00e7\u00e3o, pequenos vasos sangu\u00edneos reagem de maneira exagerada ao frio ou ao estresse e reduzem temporariamente a chegada de sangue \u00e0s extremidades.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nos casos leves, aquecer as m\u00e3os e o corpo costuma ajudar a circula\u00e7\u00e3o a voltar ao normal. Por\u00e9m, crises muito dolorosas, que ficam mais frequentes ou provocam feridas nos dedos merecem avalia\u00e7\u00e3o, porque algumas pessoas apresentam uma forma associada a outras doen\u00e7as.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que os dedos mudam de cor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo o <a href=\"https:\/\/www.niams.nih.gov\/health-topics\/raynauds-phenomenon\" target=\"_blank\" rel=\"noopener noreferrer\">National Institute of Arthritis and Musculoskeletal and Skin Diseases<\/a>, o fen\u00f4meno de Raynaud acontece quando os vasos sangu\u00edneos dos dedos se estreitam excessivamente em resposta ao frio ou ao estresse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durante uma crise, a pele pode ficar branca pela redu\u00e7\u00e3o do fluxo de sangue, depois azulada pela menor oferta de oxig\u00eanio e, quando a circula\u00e7\u00e3o retorna, avermelhada. Nem todas as pessoas passam por todas essas fases.<\/p>\n\n\n<div class=\"wp-block-image wp-block-image size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1280\" height=\"714\" src=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo.jpg\" alt=\"No fen\u00f4meno de Raynaud, os vasos dos dedos se estreitam temporariamente e alteram a cor da pele.\" class=\"wp-image-120860\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo.jpg 1280w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo-300x167.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo-1024x571.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo-768x428.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo-750x418.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_corpo-1140x636.jpg 1140w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">No fen\u00f4meno de Raynaud, os vasos dos dedos se estreitam temporariamente e alteram a cor da pele.<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">O que costuma desencadear as crises<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Algumas situa\u00e7\u00f5es favorecem o aparecimento das mudan\u00e7as de cor e do desconforto:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exposi\u00e7\u00e3o ao frio;<\/li>\n<li>Contato com objetos gelados;<\/li>\n<li>Mudan\u00e7as bruscas de temperatura;<\/li>\n<li>Estresse emocional;<\/li>\n<li>Ambientes com ar-condicionado intenso;<\/li>\n<li>Tabagismo, que pode piorar a circula\u00e7\u00e3o.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m da mudan\u00e7a de cor, podem surgir dorm\u00eancia, formigamento ou dor enquanto o fluxo sangu\u00edneo est\u00e1 reduzido ou voltando ao normal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Estudo descreveu as altera\u00e7\u00f5es dos vasos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo a revis\u00e3o <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/32007400\/\" target=\"_blank\" rel=\"noopener noreferrer\"><em>Raynaud&#8217;s phenomenon<\/em><\/a>, publicada na revista <em>Clinical Medicine<\/em>, o quadro resulta de uma resposta vascular exagerada ao frio ou ao estresse, com epis\u00f3dios revers\u00edveis de redu\u00e7\u00e3o do fluxo sangu\u00edneo principalmente nos dedos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A revis\u00e3o tamb\u00e9m diferencia o Raynaud prim\u00e1rio, que ocorre sem uma doen\u00e7a associada identific\u00e1vel, da forma secund\u00e1ria, que pode aparecer junto de condi\u00e7\u00f5es autoimunes e outras altera\u00e7\u00f5es vasculares.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que pode ajudar nos epis\u00f3dios leves<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medidas para reduzir a exposi\u00e7\u00e3o ao frio costumam ser \u00fateis quando as crises s\u00e3o leves e ocasionais:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Usar luvas em ambientes frios;<\/li>\n<li>Manter tamb\u00e9m o tronco e os p\u00e9s aquecidos;<\/li>\n<li>Evitar mudan\u00e7as bruscas de temperatura;<\/li>\n<li>Aquecer as m\u00e3os gradualmente quando a crise come\u00e7ar;<\/li>\n<li>Evitar cigarro e outros produtos com nicotina;<\/li>\n<li>Observar quais situa\u00e7\u00f5es desencadeiam os epis\u00f3dios.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Veja tamb\u00e9m outras informa\u00e7\u00f5es sobre o <a href=\"https:\/\/www.tuasaude.com\/fenomeno-de-raynaud\/\" target=\"_blank\" rel=\"noopener noreferrer\">fen\u00f4meno de Raynaud<\/a>.<\/p>\n\n\n<div class=\"wp-block-image wp-block-image size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1280\" height=\"575\" src=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela.jpg\" alt=\"Dedos brancos ou arroxeados no frio: sinais de fen\u00f4meno de Raynaud\" class=\"wp-image-120861\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela.jpg 1280w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela-300x135.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela-1024x460.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela-768x345.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela-750x337.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/09\/120858_dedos-ficam-brancos-ou-arroxeados-no-frio-por-que-a-circulac_tabela-1140x512.jpg 1140w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Dedos brancos ou arroxeados no frio: sinais de fen\u00f4meno de Raynaud<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Quando procurar avalia\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vale procurar um m\u00e9dico quando as crises se tornam <strong>muito dolorosas, frequentes ou progressivamente mais intensas<\/strong>, principalmente se come\u00e7aram apenas na idade adulta ou afetam um lado mais do que o outro.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Feridas, \u00e1reas escurecidas que n\u00e3o melhoram, perda de sensibilidade persistente ou les\u00f5es nas pontas dos dedos precisam de avalia\u00e7\u00e3o mais r\u00e1pida. Nesses casos, \u00e9 importante investigar se existe uma doen\u00e7a vascular, autoimune ou outra condi\u00e7\u00e3o contribuindo para as altera\u00e7\u00f5es da circula\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Este conte\u00fado \u00e9 apenas informativo e n\u00e3o substitui a avalia\u00e7\u00e3o, o diagn\u00f3stico ou o tratamento indicado por um m\u00e9dico.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quando os dedos ficam brancos no frio e depois podem adquirir um tom azulado ou avermelhado, uma possibilidade \u00e9 o fen\u00f4meno de Raynaud. Nessa condi\u00e7\u00e3o, pequenos vasos sangu\u00edneos reagem de maneira exagerada ao frio ou ao estresse e reduzem temporariamente a chegada de sangue \u00e0s extremidades. Nos casos leves, aquecer as m\u00e3os e o corpo [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":120859,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"format":"standard"},"jnews_primary_category":[],"jnews_social_meta":[],"jnews_override_counter":[],"footnotes":""},"categories":[111],"tags":[10277,11334,9077],"class_list":["post-120858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-saude","tag-circulacao-nas-maos","tag-dedos-arroxeados","tag-fenomeno-de-raynaud"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dedos ficam brancos ou arroxeados no frio: por que a circula\u00e7\u00e3o muda de repente - Tua Sa\u00fade<\/title>\n<meta name=\"description\" content=\"Dedos brancos no frio podem estar ligados ao fen\u00f4meno de Raynaud. 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