{"id":1441,"date":"2018-08-13T18:10:15","date_gmt":"2018-08-13T18:10:15","guid":{"rendered":"https:\/\/weedmaps.com\/learn\/cbd\/why-does-weed-make-your-eyes-red"},"modified":"2026-02-22T15:04:15","modified_gmt":"2026-02-22T15:04:15","slug":"eyes-turn-red-smoke-weed","status":"publish","type":"post","link":"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/eyes-turn-red-smoke-weed","title":{"rendered":"Why does weed make your eyes red?"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<p><span style=\"font-weight: 400\">Among the most common <\/span><span style=\"font-weight: 400\">effects of marijuana<\/span><span style=\"font-weight: 400\"> use (and telltale signs you've recently partaken) is red, bloodshot eyes. It's to be expected, sure, but that doesn't answer the mysterious question pondered by generations of stoners: <\/span><span style=\"font-weight: 400\">why does weed make your eyes red?<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">For weed novices, the onset of bloodshot eyes could cause a panic-induced internet search asking \u201c<\/span><span style=\"font-weight: 400\">can smoking weed damage your eyes?<\/span><span style=\"font-weight: 400\">\u201d Thankfully, as those who regularly consume cannabis can tell new users, there are no serious <\/span><span style=\"font-weight: 400\">health risks<\/span><span style=\"font-weight: 400\"> associated with your sudden red-eyed circumstance. You're probably not experiencing an allergic reaction or some bigger complication. Some might poke fun or chastise you for sporting your so-called \u201c<\/span><span style=\"font-weight: 400\">weed eyes<\/span><span style=\"font-weight: 400\">\u201d in public, but otherwise, it's a completely natural occurrence that transpires after smoking cannabis.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">In fact, your eyes turning red has nothing to do with the act of smoking at all.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Why Does Weed Make Your Eyes Red or Bloodshot? | Weedmaps Learn\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/kINBcmrQcSc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"under-pressure-lower-blood-pressure-and-dilated-capillaries\">\n\tUnder pressure: lower blood pressure and dilated capillaries<\/h2>\n\n\n\n<p><span style=\"font-weight: 400\">After consuming a cannabis-based product (flower, concentrate, edible, etc.), users generally experience an increase in heart rate and blood pressure. This effect is due to the plant's cannabinoids, which are chemical compounds responsible for some of the therapeutic and medicinal benefits of cannabis, and their initial interaction with the body. This rise in blood pressure and heart rate is comparable to normal physical activities like exercise or sex.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">It generally takes about five to ten minutes for users' heart rates to return to normal and for blood pressure to begin to decrease. As the blood pressure lowers, the blood vessels and capillaries dilate, including the <\/span><b>ocular capillaries<\/b><span style=\"font-weight: 400\">. The dilation of ocular capillaries causes increased blood flow to the eyes, which results in your eyes turning red and also reduces intraocular pressure. <\/span><\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?ssl=1\" data-modal-open=\"lightbox_1842\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?fit=640%2C427&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?w=1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?resize=300%2C200&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?resize=768%2C512&ssl=1 768w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"stoned red eyes\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><figcaption>The dilation of ocular capillaries causes increased blood flow to the eyes, which results in your eyes turning red in the process, and also reduces intraocular pressure.&nbsp;<\/figcaption><\/figure>\t\t\t<div id=\"lightbox_1842\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?fit=640%2C427&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?w=1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?resize=300%2C200&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2018\/08\/Stoned_stoned-1024x682-1.jpg?resize=768%2C512&ssl=1 768w\" sizes=\"100vw\" alt=\"stoned red eyes\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p><span style=\"font-weight: 400\">In fact, according to Dr. Melanie Bone, a board-certified OB-GYN who practices in West Palm Beach, Florida, \u201cIt's cannabis' ability to reduce intraocular pressure in the eyes that makes it a potentially viable treatment for <\/span><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC1358964\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">glaucoma<\/span><\/a><span style=\"font-weight: 400\">, a group of eye disorders that causes damage to the optic nerves which can eventually lead to blindness. It also happens to explain why your eyes become bloodshot after smoking cannabis.\u201d&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Evidence that the THC found in cannabis can lower intraocular pressure (IOP) is a major reason why many <\/span><span style=\"font-weight: 400\">glaucoma patients<\/span><span style=\"font-weight: 400\"> have attempted to use <\/span><a href=\"https:\/\/news.weedmaps.com\/2019\/03\/what-current-research-tells-us-about-cannabis-and-glaucoma\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">medical marijuana to treat and relieve symptoms<\/span><\/a><span style=\"font-weight: 400\"> of the disease. It's important to know that some studies have contradicted or added a caveat to the claim that cannabis is beneficial for glaucoma. For instance, a <\/span><a href=\"https:\/\/www.sciencedaily.com\/releases\/2018\/12\/181217151537.htm\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">2018 study<\/span><\/a><span style=\"font-weight: 400\"> conducted at Indiana University found that cannabidiol (CBD), the non-intoxicating cannabinoid found in marijuana, could potentially worsen the condition by increasing <\/span><span style=\"font-weight: 400\">eye pressure<\/span><span style=\"font-weight: 400\">. More research into the use of cannabis for glaucoma treatment is needed.<\/span><\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"do-edibles-make-your-eyes-red\">\n\tDo edibles make your eyes red?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400\">Similar to smoking cannabis, ingesting edibles could also make your eyes turn red. Again, this depends on the amount of THC consumed. Remember, it's not the smoke itself that makes your eyes red, but rather the ability that cannabinoids have to lower blood pressure, causing blood vessels and capillaries to dilate.&nbsp; <\/span><\/p>\n\n\n\n<h2 class=\"wm-article-table-of-contents-header\" id=\"the-redder-the-better\">\n\tThe redder the better?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400\">The amount your blood pressure is lowered and how red your eyes become depends on the amount of THC you consume.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Tetrahydrocannabinol (THC), the most common cannabinoid in the plant, is responsible for the intoxication associated with smoking cannabis. The greater the concentration of THC in a cannabis product, the stronger the effects and the redder your eyes become.<\/span><\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?ssl=1\" data-modal-open=\"lightbox_1445\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?w=1920&ssl=1 1920w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?w=1280&ssl=1 1280w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"Why Does Weed Make Your Eyes Red?\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><figcaption>The greater the concentration of THC in a cannabis product, the stronger the effects and the redder your eyes become.<\/figcaption><\/figure>\t\t\t<div id=\"lightbox_1445\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?w=1920&ssl=1 1920w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/Learn-Banner_V3.png?w=1280&ssl=1 1280w\" sizes=\"100vw\" alt=\"Why Does Weed Make Your Eyes Red?\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p><span style=\"font-weight: 400\">So, red eyes can act as a sign that your cannabis has a high cannabinoid content (i.e., it's potent). In other words, if your eyes are noticeably bloodshot after consumption, there's a good chance you've landed yourself some highly potent weed.&nbsp;&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">Other than being a dead giveaway that you've recently consumed cannabis, you have no reason to be concerned about the redness of your eyes. Cannabis-induced eye redness will typically only last a few hours and can easily resolve if you have the right tools at your disposal.&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400\">It isn't a bad idea to have eye drops (or some sunglasses) on hand. Look for eye drop brands that are specifically designed to reduce eye redness. There are other methods that could potentially help combat cannabis-induced bloodshot eyes, including staying hydrated, washing your face and eyelids with cold water, or simply consuming cannabis products with lower THC levels.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Among the most common effects of marijuana use (and telltale signs you've recently partaken) is red, bloodshot eyes. It's to be expected, sure, but that doesn't answer the mysterious question pondered by generations of stoners: why does weed make your eyes red? For weed novices,...<\/p>\n","protected":false},"author":22,"featured_media":3761,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[137],"tags":[612,1251,1252,1253,1254,1255],"class_list":["post-1441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cannabis-and-your-body","tag-cannabis-side-effects","tag-why-does-weed-make-eyes-red","tag-thc-and-blood-vessels","tag-marijuana-physical-effects","tag-thc-vasodilation","tag-cannabis-health-science"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Does Weed Make Your Eyes Red? | Weedmaps<\/title>\n<meta name=\"description\" content=\"Ever wonder why using marijuana or cannabis makes your eyes red or bloodshot? 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Discover why weed gives you bloodshot eyes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/eyes-turn-red-smoke-weed\" \/>\n<meta property=\"og:site_name\" content=\"Weedmaps\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Weedmaps\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-08-13T18:10:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-22T15:04:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2021\/03\/CRTV-4154_April-May-Learn_Red-Eyes_026_1600x900.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Melanie Bone\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@weedmaps\" \/>\n<meta name=\"twitter:site\" content=\"@weedmaps\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Melanie Bone\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed\"},\"author\":{\"name\":\"Melanie Bone\",\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/#\\\/schema\\\/person\\\/2aba0df0ec9bcc48bc5f7d6129337d4c\"},\"headline\":\"Why does weed make your eyes red?\",\"datePublished\":\"2018-08-13T18:10:15+00:00\",\"dateModified\":\"2026-02-22T15:04:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed\"},\"wordCount\":773,\"publisher\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/weedmaps.com\\\/learn\\\/wp-content\\\/uploads\\\/2021\\\/03\\\/CRTV-4154_April-May-Learn_Red-Eyes_026_1600x900.jpg?fit=1600%2C900&ssl=1\",\"keywords\":[\"cannabis side effects\",\"why does weed make eyes red\",\"THC and blood vessels\",\"marijuana physical effects\",\"THC vasodilation\",\"cannabis health science\"],\"articleSection\":[\"Body\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed\",\"url\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed\",\"name\":\"Why Does Weed Make Your Eyes Red? | Weedmaps\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/weedmaps.com\\\/learn\\\/cannabis-and-your-body\\\/eyes-turn-red-smoke-weed#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/weedmaps.com\\\/learn\\\/wp-content\\\/uploads\\\/2021\\\/03\\\/CRTV-4154_April-May-Learn_Red-Eyes_026_1600x900.jpg?fit=1600%2C900&ssl=1\",\"datePublished\":\"2018-08-13T18:10:15+00:00\",\"dateModified\":\"2026-02-22T15:04:15+00:00\",\"description\":\"Ever wonder why using marijuana or cannabis makes your eyes red or bloodshot? 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