Swollen feet usually improve with a few simple strategies: elevating your legs, moving around, cutting back on salt, and wearing compression socks. Most foot swelling happens when excess fluid leaks from tiny blood vessels into the surrounding tissue and pools in your lower extremities, pulled there by gravity. The cause is often temporary, like sitting too long or eating a salty meal, but persistent swelling can signal something that needs medical attention.
Why Feet Swell in the First Place
Your body constantly moves fluid between your bloodstream and the tissue around it. Swelling occurs when that balance tips and more fluid enters the tissue than drains back out. This can happen through several routes: pressure building up inside your veins, your blood vessels becoming more permeable, or your lymphatic system failing to clear fluid efficiently.
Gravity makes your feet and ankles the most common landing zone. Sitting at a desk all day, standing for hours, flying on a long flight, or simply being in hot weather can all cause temporary pooling. Hormonal shifts during pregnancy or before a menstrual period do the same thing. These cases tend to resolve on their own once you change position or cool down.
Chronic swelling that shows up day after day often points to venous insufficiency, a condition where the valves in your leg veins weaken and blood flows backward instead of returning to the heart. People with venous insufficiency typically notice aching, heaviness, and visible veins alongside the swelling, and it tends to worsen the longer they stand.
Elevate Your Legs (But Keep It Comfortable)
Elevation is the fastest way to get fluid moving out of your feet. Lying down and propping your legs on a pillow is enough. You don’t need to hoist them high above your heart. A study comparing high leg elevation (about 30 cm, or 12 inches) to low elevation (about 10 cm, or 4 inches, on a pillow) after ankle surgery found no significant difference in swelling reduction. The higher position actually caused more discomfort without added benefit.
One important caveat: the effect doesn’t last long once you stand back up. Research on ankle sprain patients showed that the swelling-reducing benefit of elevation faded within about five minutes of returning to an upright position. That means elevation works best as a repeated habit throughout the day, not a one-and-done fix. Try propping your feet up for 15 to 20 minutes several times a day, especially after periods of standing or sitting.
Get Your Calves Working
Your calf muscles act as a pump for your veins. Every time they contract, they squeeze blood upward toward your heart, pulling fluid out of your lower legs. When you sit or stand still for long stretches, that pump shuts off and fluid accumulates.
Ankle pumps are one of the simplest exercises to restart circulation. Sit or lie with your legs extended, then point your toes toward your knees as far as you can, followed by pointing them away from you. Alternate back and forth for two to three minutes, and repeat two to three times per hour when you’re sedentary. Walking, even briefly, accomplishes the same thing. If you work at a desk, setting a timer to get up and move every 30 to 60 minutes makes a noticeable difference over the course of a day.
Cut Back on Sodium
Salt causes your body to hold onto water. For people who already deal with fluid retention, reducing sodium intake is one of the most effective long-term strategies. Most health organizations recommend staying under 2,000 mg of sodium per day if you have noticeable swelling or fluid overload. For context, a single fast-food meal can easily contain 1,500 mg or more.
The biggest sources of sodium aren’t the salt shaker on your table. They’re processed and packaged foods: canned soups, deli meats, frozen meals, bread, condiments, and restaurant dishes. Reading nutrition labels and cooking more meals at home gives you far more control. When you reduce sodium, your kidneys gradually release the extra water your body has been holding, and swelling decreases over days to weeks.
Drinking enough water also helps. It sounds counterintuitive, but adequate hydration supports your kidneys in flushing excess sodium rather than retaining it. Restricting water when you’re swollen can actually slow down the process.
Try Compression Socks
Compression stockings apply graduated pressure to your legs, tightest at the ankle and gradually loosening as they go up. This helps push fluid back into your veins and prevents it from pooling in your feet.
Over-the-counter options typically come in the 15 to 20 mmHg range (a measure of pressure), which is enough for mild, everyday swelling from sitting or traveling. Medical-grade stockings start at 18 to 30 mmHg and go up to 40 mmHg or higher for more significant edema or diagnosed venous insufficiency. If basic drugstore compression socks don’t seem to help, a higher-grade pair prescribed by a doctor may be worth trying.
Put them on first thing in the morning, before swelling has a chance to set in. They’re harder to get on and less effective once your feet are already puffy.
Epsom Salt Soaks
Soaking your feet in warm water with Epsom salt is a popular home remedy, and there’s limited but positive evidence behind it. A small clinical study of 40 pregnant women with foot edema compared Epsom salt soaks to foot exercises over three days. The soak group (30 grams of Epsom salt dissolved in one liter of lukewarm water for 20 minutes daily) saw a 73.75% reduction in edema scores, compared to 55% in the exercise group. Both groups went from moderate or severe swelling to trace or mild swelling by the end.
The warm water itself likely plays a role by promoting circulation, and the osmotic effect of the salt may help draw some fluid out through the skin. It’s not a substitute for addressing the underlying cause, but as a comfort measure, a 20-minute soak can provide temporary relief.
How to Tell If Swelling Is Serious
Temporary, symmetrical swelling in both feet after a long day or a salty meal is rarely dangerous. But certain patterns deserve prompt attention:
- Sudden swelling in one leg only could indicate a blood clot (deep vein thrombosis), especially if it’s accompanied by pain, redness, or warmth in the calf.
- Chronic swelling in both legs that doesn’t resolve with elevation and lifestyle changes may point to venous insufficiency, heart failure, or kidney or liver problems.
- Skin changes like thickening, discoloration, or sores that won’t heal suggest the swelling has been present long enough to damage tissue.
Doctors assess swelling severity using a pitting test: pressing a finger into the swollen area and measuring how deep the dent is and how long it takes to bounce back. A shallow 2 mm pit that rebounds immediately is Grade 1, while an 8 mm pit that takes two to three minutes to fill back in is Grade 4. If you press your ankle and the indent lingers for more than a few seconds, that’s worth getting evaluated, especially if the swelling is new or worsening over weeks.