{"id":14802,"date":"2026-05-28T11:17:52","date_gmt":"2026-05-28T03:17:52","guid":{"rendered":"https:\/\/www.rainbownails.com.hk\/blog\/?p=14802"},"modified":"2026-05-28T11:17:55","modified_gmt":"2026-05-28T03:17:55","slug":"nvidia-ceo-jensen-huangs-black-nails-sparks-million-view-debate-is-handshaking-contagious-learn-to-tell-the-difference-between-a-fungal-nail-and-a-bruise-in-one-second","status":"publish","type":"post","link":"https:\/\/www.rainbownails.com.hk\/blog\/tutorial1\/nvidia-ceo-jensen-huangs-black-nails-sparks-million-view-debate-is-handshaking-contagious-learn-to-tell-the-difference-between-a-fungal-nail-and-a-bruise-in-one-second","title":{"rendered":"Nvidia CEO Jensen Huang&#8217;s &#8220;Black Nails&#8221; Sparks Million-View Debate! Is Handshaking Contagious? Learn to Tell the Difference Between a &#8220;Fungal Nail&#8221; and a &#8220;Bruise&#8221; in One Second"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21-600x600.png\" alt=\"\" class=\"wp-image-14806\" srcset=\"https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21-600x600.png 600w, https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21-150x150.png 150w, https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21-350x350.png 350w, https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21-768x768.png 768w, https:\/\/www.rainbownails.com.hk\/blog\/wp-content\/uploads\/wordpress\/image-21.png 1024w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Recently, every move of Nvidia CEO Jensen Huang has been in the spotlight, but who would have thought his &#8220;thumb&#8221; would also become a focal point! A netizen captured a close-up photo of his grayish-black thumbnail and even posted a warning: &#8220;If you meet Jensen Huang, don&#8217;t shake his hand, beware of catching a fungal nail infection.&#8221; This post instantly attracted over a million views.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But wait, does a black nail definitely mean a fungal infection? Is it really contagious through a handshake? Today, through the professional analysis of authoritative dermatologists and ENT doctors, we will teach you how to debunk the myths of nail discoloration and easily distinguish between a &#8220;fungal nail&#8221; and a &#8220;trauma bruise&#8221;!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Debunking the Myth: Is shaking hands with someone with &#8220;black nails&#8221; contagious?<\/strong><br>First, the question everyone cares about most: A normal handshake will not transmit a fungal nail infection!<br>Specialist doctors point out that although a fungal nail is a fungal infection, it usually occurs in people with weaker immune systems. Unless your own nail happens to have a defect or wound, a simple polite handshake is very safe. The excessive panic among netizens is really unnecessary!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Practical Guide: How to distinguish between a &#8220;fungal nail&#8221; and a &#8220;bruise&#8221;?<\/strong><br>The most common cause of nails turning black or gray is actually trauma, followed by infection. You can make an initial self-assessment through the following key points:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Trauma Bruise (Subungual Hematoma)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cause:<\/strong> Usually has a clear history of injury, such as being caught in a door, hit by a heavy object, or getting a &#8220;jammed finger&#8221; during sports.<\/li>\n\n\n\n<li><strong>Appearance:<\/strong> The color is mostly purplish-black or grayish-black with a hint of bruising.<\/li>\n\n\n\n<li><strong>Accompanying symptoms:<\/strong> In the early stages of injury (first 2 to 3 days), there will be noticeable swelling and severe pain.<\/li>\n\n\n\n<li><strong>Affected area:<\/strong> Usually, only the &#8220;injured&#8221; nail will change color.<\/li>\n\n\n\n<li><strong>Recovery time:<\/strong> Because the blood circulation under the nail is poor, the bruise fades very slowly. It usually takes nearly a month or even longer, and will slowly be pushed out as the new nail grows.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fungal Nail (Onychomycosis)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cause:<\/strong> Fungal infection, often occurring in people who frequently touch water, have poor immunity, or have hot, sweaty feet (more common on toes than fingers).<\/li>\n\n\n\n<li><strong>Appearance:<\/strong> The nail not only changes color (may turn yellow, gray, or black) but is also accompanied by thickening, brittleness, crumbling, or even separation from the nail bed.<\/li>\n\n\n\n<li><strong>Accompanying symptoms:<\/strong> Usually painless in the early stages.<\/li>\n\n\n\n<li><strong>Affected area:<\/strong> Fungi are contagious and usually affect several adjacent nails, but rarely affect &#8220;all ten fingers.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How do specialist doctors view Jensen Huang&#8217;s nails?<\/strong><br>Authoritative dermatologist Dr. Chou Tsu-man analyzed that not only is Jensen Huang&#8217;s thumb discolored, but several other fingers also have dullness, and the nail folds show signs of damage from frequent contact with water. This situation of &#8220;multiple fingers changing color at the same time&#8221; is more likely caused by pigmentation from taking specific medications (such as antibiotics, immunosuppressants, etc.), or damage to the nail folds due to over-cleaning\/frequent contact with water, which affects nail growth, rather than a fungal infection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bonus: Could a black nail be skin cancer?<\/strong><br>Many people worry that a dark shadow on their nail might be a terrifying &#8220;malignant melanoma.&#8221; Doctors remind us that if your nail shows the following 5 major warning signs, be sure to seek medical attention as soon as possible:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The color intensity, line thickness, or spacing of the black streaks are uneven.<\/li>\n\n\n\n<li>The pigment extends and bleeds into the skin in front of the nail.<\/li>\n\n\n\n<li>The streak presents a triangular shape that is &#8220;narrow at the front and wide at the back.&#8221;<\/li>\n\n\n\n<li>The black streak covers more than 2\/3 of the nail surface.<\/li>\n\n\n\n<li>The black streaks are suddenly discovered after the age of 50.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(Note: Jensen Huang&#8217;s black nails are mostly on the distal 2\/3, with no pigmentation on the proximal end, so doctors judge the probability of a malignant tumor to be extremely low.)<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Accidentally pinched your finger? First aid for a bruised nail<\/strong><br>If you really accidentally pinch your hand, causing a subungual hematoma, please remember the following first aid steps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Acute phase icing:<\/strong> Within a few hours after the injury, apply an ice pack (ice water in a plastic bag) wrapped in a towel (apply for 10 minutes, rest for 30 minutes) to reduce swelling and pain.<\/li>\n\n\n\n<li><strong>Seek medical attention for severe swelling and pain:<\/strong> If the pain is unbearable, doctors can make a small hole in the nail for &#8220;drainage and decompression,&#8221; which can instantly and significantly relieve the pain. If bone damage is suspected, an X-ray is also needed for confirmation!<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Conclusion<\/strong><br>Nails are like a &#8220;small window&#8221; to your body&#8217;s health. Color changes may indicate trauma, nutritional deficiencies (such as lack of calcium or protein), or medication effects. Next time you see someone with a different nail color, don&#8217;t rush to fear being infected. With a little more medical common sense, you can avoid unnecessary panic! If you have doubts about your own nail condition, the safest approach is always to seek a professional diagnosis directly from a dermatologist!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Is Nvidia CEO Jensen Huang&#8217;s black nail a contagious fungal infection or a bruise? Experts debunk handshake myths and explain how to tell the difference.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false,"_links_to":"","_links_to_target":""},"categories":[369,5],"tags":[2661,1344,2717,562,2716,2712,2715],"class_list":["post-14802","post","type-post","status-publish","format-standard","hentry","category-highlight","category-tutorial1","tag-2661","tag-black-nail","tag-bruise","tag-fungal-nail","tag-jensen-huang","tag-nvidia","tag-onychomycosis"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Is Nvidia CEO Jensen Huang&#039;s black nail a contagious fungal infection or a bruise? 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