Feet as health indicators: From TikTok trends to medical evidence

A video trend sweeping TikTok shows people standing in shallow trays of Epsom salt for ten minutes before bed, claiming the practice lowers stress hormones and boosts mood-lifting chemicals in the brain. The salt-stepping ritual has gained traction among users who pair it with the concept of grounding—direct contact with the earth—and credit the magnesium in the salt with helping them sleep better. But when you ask a physiotherapist what's actually happening, the answer is more modest. Susan Jacob, who practices at Aster Cedars Hospital and Clinic in Dubai, says the warm water itself is likely doing most of the work. It relaxes muscles, improves blood flow to the feet, and creates a calming routine before sleep. The magnesium absorption through skin remains scientifically unproven. "If it helps you unwind and you enjoy it, it can be a safe part of your bedtime routine," Jacob says, which is a careful way of saying: it probably won't hurt, and the placebo effect is real.

But the TikTok trend points to something doctors have known for years: your feet are telling you things about your body that you might not hear anywhere else. Diabetes often announces itself through the feet first—nerve damage, loss of sensation, slow-healing wounds. Peripheral arterial disease shows up as cold feet and pain when you walk. Arthritis makes joints swell and stiffen. Heart failure, kidney disease, and liver disease can all present their first visible symptoms in the feet and ankles, swelling them like balloons. Dr. Shahdan Kotb, a specialist in physical medicine and rehabilitation at RAK Hospital, calls the feet a window to your health. Changes in color, numbness, swelling, slow-healing wounds, or unusual nail growth can signal disease before it announces itself anywhere else. A person with poor circulation gets cold feet. Nerve damage brings numbness. Swelling in the ankles might mean your heart, kidneys, or liver are struggling.

The practical work of keeping feet healthy is unglamorous but essential. Daily inspection matters. Fungal infections crack the skin and thicken nails, so you need to look. Wash thoroughly, dry completely, moisturize the dry patches—but don't rub cream between the toes, where moisture can breed infection. Stay physically active to keep blood moving. If you have diabetes, get your feet checked regularly. Shoes matter enormously. They should fit without crushing your toes, allow natural movement while keeping you stable, and provide real support. The barefoot shoe trend requires caution. Jacob warns that these minimal shoes can strain the calf muscles and Achilles tendon during the adjustment period and can worsen plantar fasciitis, severe flat feet, arthritis, or diabetic nerve damage. If someone wants to try them, she recommends a gradual transition over weeks or months, with professional assessment of foot strength and individual biomechanics first.

Beyond basic care, several wellness practices have emerged that claim to work through the feet. Reflexology, rooted in ancient Chinese, Indian, and Egyptian medicine, applies pressure to specific points on the feet based on the idea that the body divides into ten vertical zones from head to toe, with organs and body parts corresponding to specific toe and finger areas. Practitioners say they can read health problems through these pressure points and trigger relaxation by activating the parasympathetic nervous system. Reflexology shoes with textured insoles promise the same effects. Jacob is skeptical of the medical claims. "There is no strong scientific evidence that reflexology shoes treat internal organ conditions or improve overall health through pressure points," she says. She views them as comfort products, not medical treatments.

Grounding—simply walking barefoot on earth—costs nothing and requires no equipment, though the modern wellness industry has created grounding mats and patches to simulate the effect. The practice gained prominence in the mainstream wellness world around 1998, though humans have been barefoot for most of history. A 2015 study in the US National Library of Medicine found that direct contact between the human body and the earth's surface produced measurable effects on inflammation, immune response, wound healing, and chronic inflammatory diseases. Pavan Nihalani, a hypnotherapist at Illuminations Wellbeing Centre in Dubai, describes it as sensory contact that helps balance against modern stress. Shalin Balasuriya, co-founder of Spa Ceylon, notes that different surfaces—grass, soil, sand—feel distinct beneath the feet and naturally draw attention into the present moment. Walking on sand is particularly effective because the surface constantly shifts, forcing the feet and lower body to adjust with each step, making movement feel intentional. At the seashore, this combines with waves, air movement, and open horizon into a complete sensory experience.

Acupuncture, a cornerstone of traditional Chinese medicine, claims to help feet by improving blood flow, reducing swelling, and easing tight muscles through the placement of extremely thin needles at specific points. The needles are said to block pain signals and allow healing. Scientific evidence is patchy—most studies involve mice—making the anti-inflammatory benefits largely anecdotal. The most common foot problems treated with acupuncture are plantar fasciitis, peripheral neuropathy, Achilles tendinitis, and arthritis. Zhenxing Xu, a doctor at You Kang Medical Clinic, explains that traditional Chinese medicine views acupuncture as a holistic system coordinating points throughout the entire body. Six major meridians run through the feet, but treatment often combines foot points with points on the legs, body, and torso. One effective acupoint on the foot is Taichong, also called Liver 3, which practitioners use to soothe the liver and relieve stagnation—particularly helpful for insomnia caused by anxiety. The evidence for these practices varies widely, but the underlying message is consistent: your feet deserve attention, both as a daily health practice and as a mirror reflecting what's happening inside.