{"id":908,"date":"2026-04-27T16:26:35","date_gmt":"2026-04-27T16:26:35","guid":{"rendered":"https:\/\/edmpackz.com\/?p=908"},"modified":"2026-04-27T16:26:35","modified_gmt":"2026-04-27T16:26:35","slug":"why-your-fingers-wrinkle-in-water-and-what-it-can-reveal-about-your-health","status":"publish","type":"post","link":"https:\/\/edmpackz.com\/?p=908","title":{"rendered":"Why your fingers wrinkle in water (and what it can reveal about your health)"},"content":{"rendered":"
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\"NeilNeil Juggins\/Alamy<\/span><\/div>\n<\/div>\n
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After a few minutes in warm water, the skin on our fingertips wrinkles like a shrivelled prune (Credit: Neil Juggins\/Alamy)<\/figcaption><\/figure>\n<\/div>\n
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The skin on our fingertips and toes shrivels like prunes when soaked for a few minutes in water. But is this an adaptation that occurred to help us in our evolutionary past? And what can it reveal about your health today?<\/b><\/p>\n

Spend more than a few minutes soaking in a bath or paddling around a swimming pool and your fingers will undergo a dramatic transformation. Where there were once delicate whorls of lightly ridged epidermis, engorged folds of ugly pruned skin will now be found.<\/p>\n

And according to a recently published study, this striking change is worth a closer inspection \u2013 each time your fingertips pucker in this way,\u00a0the wrinkles create the same pattern<\/a>.<\/p>\n

It is the latest discovery about\u00a0a phenomenon<\/a>\u00a0that\u00a0has\u00a0occupied the thoughts and work of scientists for decades<\/a>. Bafflingly, only the skin on our fingers and toes wrinkles when immersed in water. Other body parts such as our forearms, torso, legs and face remain no more crinkled than they were before being submerged.<\/p>\n

Most researchers in the field have puzzled over what causes this puckering in the first place, but more recently the question of why and what purpose it may serve, has attracted their attention.<\/p>\n<\/div>\n<\/div>\n

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Perhaps more intriguing still, however, is what our shrivelled fingers can reveal\u00a0about our own health<\/a>. Scientists have discovered changes in how our fingers wrinkle can point to diseases including\u00a0type 2 diabetes<\/a>,\u00a0cystic fibrosis<\/a>,\u00a0nerve injuries<\/a>\u00a0and even\u00a0cardiovascular problems<\/a>.<\/p>\n

What causes our fingers to wrinkle<\/b><\/span><\/h2>\n

It takes around\u00a03.5 minutes in warm water\u00a0<\/a>\u2013 40C (104F) is considered the optimal temperature \u2013 for your fingertips to begin wrinkling, while in cooler temperatures of about 20C (68F) it can take up to 10 minutes. Most studies have found it takes around 30 minutes of soaking time to\u00a0reach maximum wrinklage<\/a>, however. (Interestingly, recent research has shown that soaking your hands in warm vinegar can\u00a0make your skin wrinkle far faster<\/a>\u00a0\u2013 in around just four minutes.)<\/p>\n

Fingertip wrinkling was commonly thought to be a passive response where the upper layers of the skin swelled as water flooded into the\u00a0cells via a process known as osmosis\u00a0<\/a>\u2013 where water molecules move across a membrane to equalise the concentration of the solutions on either side. But as\u00a0long ago as 1935<\/a>, scientists have suspected there is more to the process than this.<\/p>\n

Doctors studying patients with injuries that had severed the median nerve \u2013 one of the main nerves that run down the arm to the hand \u2013 found that\u00a0their fingers did not wrinkle<\/a>. Among its many roles, the\u00a0median nerve helps to control so-called sympathetic activities<\/a>\u00a0such as sweating and the constriction of blood vessels. Their discovery suggested that the water-induced wrinkling of fingertips was in fact controlled by the nervous system.<\/p>\n

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\"AndriiAndrii Biletskyi\/Alamy<\/span><\/div>
The skin on our feet and hands shrivel and wrinkle in the bath, while other parts of our body do not undergo the same transformation (Credit: Andrii Biletskyi\/Alamy)<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Later studies by doctors in the 1970s provided further evidence of this, and they proposed using the\u00a0immersion of the hands in water<\/a>\u00a0as\u00a0a simple bedside test<\/a>\u00a0to\u00a0assess nerve damage that might affect the regulation of unconscious processes<\/a>\u00a0such as blood flow.<\/p>\n

Then in 2003, neurologists Einar Wilder-Smith and Adeline Chow, who were working at the National University Hospital in Singapore at the time, took measurements of blood circulation in the hands of volunteers as they soaked them in water. They found that as the skin on the volunteers’ fingertips began to wrinkle, there was\u00a0a significant drop in blood flow in the fingers<\/a>.<\/p>\n

When they applied a local anesthetic cream that caused the blood vessels in the fingers of healthy volunteers to temporarily constrict, they found it\u00a0produced similar levels of wrinkling<\/a>\u00a0as water immersion.<\/p>\n

“It makes sense when you look at your fingers when they go wrinkly,” says Nick Davis, a neuroscientist and psychologist at Manchester Metropolitan University, who has studied fingertip wrinkling. “The finger pads go pale and that is because the blood supply is being constricted away from the surface.”<\/p>\n

Wilder-Smith and his colleagues proposed that when our hands are immersed in water, the sweat ducts in our fingers open up to allow water in, which leads to an imbalance in the salts in our skin. This change in the salt balance triggers the firing of nerve fibres in the fingers, leading to the blood vessels around the sweat ducts to constrict. This in turn causes a loss of volume in the fleshy area of the fingertip, which\u00a0pulls the overlying skin downwards so that it distorts into wrinkles<\/a>. The pattern of the wrinkles depends on the way the outermost layer of skin \u2013 the epidermis \u2013 is anchored to the layers beneath it.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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