Elevating your feet, staying active, wearing compression socks, and cutting back on salt are the most effective ways to reduce swelling in your feet. Most foot swelling comes from fluid pooling in your lower legs due to gravity, prolonged sitting or standing, or excess sodium in your diet. The fix usually involves helping that fluid drain and preventing it from building up in the first place.
Elevate Your Feet Above Your Heart
The simplest and fastest way to reduce foot swelling is elevation. Lie down and prop your legs up so your feet sit above the level of your heart. This lets gravity work in your favor, pulling trapped fluid back toward your core where your body can process and eliminate it. Aim for about 15 minutes per session, three to four times a day. A stack of pillows or a wedge cushion on the couch works well. If you only do it once in the evening, you’ll still notice a difference, but consistency throughout the day makes a bigger impact.
Move Your Ankles and Calves Regularly
Your calf muscles act as a pump for the veins in your lower legs. Every time you flex your foot or take a step, those muscles squeeze blood and fluid upward toward your heart. When you sit or stand still for long stretches, that pump shuts off and fluid settles into your feet and ankles.
If you’re stuck at a desk, on a long flight, or recovering from a procedure, ankle pumps are the go-to exercise. Point your toes toward your knees as far as you can, then point them away from you as far as you can. Alternate back and forth for two to three minutes, and repeat two to three times per hour. It’s a small motion, but it activates that calf pump and keeps fluid circulating. Walking, even for a few minutes every hour, does the same thing more effectively.
Try Compression Socks
Compression socks apply graduated pressure to your legs, tightest at the ankle and lighter as they go up. This helps push fluid upward and prevents it from pooling. They come in different pressure levels measured in millimeters of mercury (mmHg), and the right level depends on how much swelling you’re dealing with.
- 15 to 20 mmHg (mild): Good for everyday prevention, air travel, or very early swelling. This is the lightest medical-grade level and a good starting point if you’ve never worn compression before.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for mild to moderate swelling. This works well for daily wear when you need a balance of effectiveness and comfort, or for swelling after an injury or surgery.
- 30 to 40 mmHg (firm): Reserved for more persistent or significant swelling, especially in the lower legs where gravitational load is higher. Typically recommended by a clinician rather than chosen on your own.
Put them on first thing in the morning before swelling has a chance to build. They’re harder to get on once your feet are already puffy, and they work best as prevention rather than treatment after the fact.
Cut Back on Sodium
Sodium makes your body hold onto water, and that extra fluid often shows up in your feet and ankles first. The average American eats well over the recommended limit, and even modest reductions can make a noticeable difference in how puffy your feet feel by the end of the day.
Most excess sodium comes from packaged and restaurant food, not the salt shaker on your table. Canned soups, deli meats, frozen meals, sauces, and bread are some of the biggest contributors. Reading labels helps: anything over 600 mg of sodium per serving is high. Eating more potassium-rich foods like bananas, sweet potatoes, and leafy greens can also help counterbalance sodium’s effect on fluid retention. The American Heart Association notes that reducing sodium and increasing potassium together is more effective than either change alone.
Consider Magnesium
A magnesium deficiency can contribute to water retention and swelling. Cleveland Clinic podiatrist Georgeanne Botek has noted that taking 200 to 400 mg of magnesium daily may help reduce swelling, particularly if your levels are low. Magnesium is also found in nuts, seeds, dark chocolate, and leafy greens. If you have kidney or heart problems, check with your doctor before supplementing, since your kidneys regulate how much magnesium stays in your body.
Soak in Epsom Salt
An Epsom salt foot soak won’t fix the underlying cause of swelling, but it can provide temporary relief and feels good after a long day on your feet. The standard recipe is half a cup of Epsom salt dissolved in a gallon of lukewarm water. Soak for about 15 minutes, then dry your feet thoroughly. The warm water helps relax muscles and improve circulation, and the magnesium sulfate in Epsom salt may contribute modest anti-inflammatory effects through the skin.
When Swelling Signals Something Serious
Foot swelling that responds to elevation, movement, and lifestyle changes is usually harmless. But certain patterns should get your attention.
Sudden swelling in one foot or leg, especially with pain, warmth, or redness, needs prompt evaluation. This is the classic presentation of a deep vein thrombosis (DVT), a blood clot in the leg that can become dangerous if it travels to the lungs. Risk factors include recent surgery, long periods of immobility, pregnancy, and a history of clotting disorders. The distinction between one-sided and two-sided swelling matters: acute swelling in just one leg warrants urgent evaluation, while swelling in both legs is more commonly tied to systemic causes like heart, kidney, or liver issues, or medications.
Swelling that doesn’t improve with elevation, gets progressively worse over weeks, or leaves a lasting dent when you press on it (called pitting edema) also deserves medical attention. Some common medications, including certain blood pressure drugs, anti-inflammatory painkillers, and hormones, can cause fluid retention as a side effect. If your swelling started around the same time as a new prescription, that connection is worth raising with your provider.