Elevating your feet above heart level is the fastest way to reduce swelling, often producing noticeable results within 15 to 30 minutes. But the best approach depends on what’s causing the swelling in the first place. Foot and ankle swelling happens when fluid leaks out of tiny blood vessels and pools in the surrounding tissue, and everything from sitting too long to eating salty food to a serious medical condition can trigger it. Here’s how to bring it down and keep it from coming back.
Why Your Feet Swell
Your body constantly moves fluid between your bloodstream and the tissue around it. Pressure inside your blood vessels pushes fluid out, while proteins (especially one called albumin) pull fluid back in. When that balance tips, fluid accumulates in your tissues, and gravity pulls it straight to your feet and ankles.
Several things can tip that balance. Standing or sitting for hours raises the pressure inside the veins in your legs, forcing more fluid out. Eating a lot of sodium causes your kidneys to hold onto extra water, expanding your blood volume and increasing that pressure further. Certain medications, including blood pressure drugs, anti-inflammatory painkillers, and some diabetes medications, can cause fluid retention through different pathways: making your kidneys hold sodium, widening blood vessels so more fluid leaks through, or slowing your lymphatic system’s ability to drain excess fluid.
Pregnancy, excess body weight, and hormonal shifts can all contribute. More serious causes include heart failure, liver disease, kidney problems, and blood clots. When heart failure is involved, the body enters a cycle where reduced blood flow signals the kidneys to retain even more salt and water, which worsens the swelling.
Elevate Your Feet the Right Way
Elevation works because it uses gravity in your favor, helping fluid drain back toward your heart. But the angle matters. A study testing five different elevation angles found a clear linear relationship: the higher the legs, the more fluid drained. Even lying flat (zero degrees of elevation) reduced some swelling, but raising the legs to 30 or 45 degrees was significantly more effective.
For practical purposes, lie on your back and prop your feet on a stack of pillows or the arm of a couch so they sit above chest level. You don’t need to go to extreme angles. Fifteen minutes at 30 degrees produces meaningful results, and 30 minutes is even better. If you’re dealing with persistent swelling, try to do this two or three times throughout the day rather than one long session.
Use Compression to Prevent Pooling
Compression stockings apply steady pressure that keeps fluid from accumulating in the first place. They come in different pressure levels measured in millimeters of mercury (mmHg), and choosing the right level makes a real difference.
- 10 to 15 mmHg: The lightest level. Effective for preventing mild, everyday swelling from prolonged sitting or standing. Available without a prescription at most pharmacies.
- 15 to 20 mmHg: A step up, and the most popular over-the-counter option. Studies show these significantly reduce fluid buildup during a full workday.
- 20 to 30 mmHg: Medical-grade compression that provides even greater reduction. Research found these particularly effective for people who sit for long periods. Some brands sell these over the counter, though a healthcare provider can help with sizing.
Put compression stockings on first thing in the morning before swelling has a chance to build. If your feet are already swollen, elevate them for 15 to 20 minutes first, then put the stockings on. Knee-high stockings work well for foot and ankle swelling. Make sure they fit snugly but don’t dig in or bunch behind the knee.
Get Your Calf Muscles Working
Your calf muscles act as a pump for your veins. Every time they contract, they squeeze blood upward toward your heart. When you sit or stand still for hours, that pump goes idle and fluid settles downward. Activating it doesn’t require a workout, just a few targeted movements repeated throughout the day.
Ankle pumps are the simplest option: while seated or lying down, pull your toes up toward your shin, then point them away from you. Repeat 5 to 10 times. Heel raises work the same pump from a different angle. Sitting with your feet flat on the floor, lift just your heels while keeping your toes down, 5 to 10 repetitions. If you’re stuck standing, hold onto a counter or chair back and rise up onto the balls of your feet, then slowly lower back down. Do these every 30 to 60 minutes during long periods of sitting or standing.
Walking is the most natural way to activate the calf pump. Even a five-minute walk around the office or house every hour can meaningfully reduce how much your feet swell by the end of the day.
Cut Back on Sodium
Sodium directly causes your body to retain water. The more salt you eat, the more fluid your kidneys hold onto, and that extra volume increases pressure in your blood vessels, pushing fluid into your tissues. Reducing your sodium intake is one of the most effective long-term strategies for managing recurrent swelling.
The American Heart Association recommends staying under 1,500 mg of sodium per day. For context, a single teaspoon of table salt contains about 2,300 mg, and the average American eats over 3,400 mg daily. Most of that sodium comes from packaged and restaurant food, not the salt shaker. Canned soups, deli meats, frozen meals, bread, cheese, and condiments like soy sauce are common culprits. Reading nutrition labels and choosing “low sodium” options can cut your intake substantially without overhauling your entire diet.
Drinking enough water also helps. It sounds counterintuitive, but mild dehydration signals your kidneys to hold onto more fluid. Staying well-hydrated helps your body release excess water rather than store it.
Other Strategies That Help
Soaking swollen feet in cool (not ice-cold) water can constrict blood vessels and reduce fluid leakage into surrounding tissue. Fifteen to 20 minutes is enough. Epsom salt baths are popular, though the cooling effect of the water likely matters more than the magnesium in the salt.
If you notice that swelling worsens with a particular medication, mention it to your prescriber. Blood pressure medications called calcium channel blockers are well known for causing ankle swelling, as are certain steroids and hormonal medications. Adjusting the dose or switching to an alternative often resolves the problem.
Sleeping with a pillow under your lower legs keeps fluid from pooling overnight. Avoiding tight clothing around the thighs and waist also helps, since anything that restricts venous return from the legs can trap fluid below.
When Swelling Signals Something Serious
Swelling in both feet that develops gradually is usually related to lifestyle factors, medications, or a chronic condition like venous insufficiency. Swelling in just one leg is a different story. Sudden swelling in a single leg, especially with warmth, redness, tenderness, or pain in the calf, can indicate a deep vein thrombosis (blood clot). This requires urgent medical evaluation, particularly if the swelling appeared within the past 72 hours.
Bilateral swelling that comes with shortness of breath, chest tightness, or difficulty lying flat may point to heart failure or kidney disease. Swelling that leaves a visible dent when you press on it (called pitting edema) and doesn’t improve with elevation over several days also warrants medical attention. The same goes for swelling accompanied by skin changes like thickening, discoloration, or open sores, which can indicate chronic venous insufficiency that benefits from professional treatment.