Elevating your feet above heart level is the fastest way to get swelling down, often producing visible results within 20 to 30 minutes. But depending on why your feet are swollen, you may need a combination of strategies, from compression and movement to dietary changes, to keep the swelling from coming back. Here’s what actually works and when swelling signals something more serious.
Elevate Your Feet Above Your Heart
Gravity is the simplest tool you have. When you sit or stand for long periods, fluid pools in your lower legs because your veins have to fight gravity to push blood back up. Lying down and propping your feet on pillows so they sit above chest level lets that fluid drain naturally. Aim for 15 to 30 minutes, three or four times a day if swelling is persistent. A recliner that tips back far enough works, but lying flat with your legs on a stack of pillows is more effective because it creates a steeper downhill path for the fluid.
Use Compression to Keep Fluid Moving
Compression stockings apply graduated pressure to your legs, tightest at the ankle and loosening as they go up, which helps push fluid back toward your heart. They come in several pressure levels measured in millimeters of mercury (mmHg):
- 15 to 20 mmHg (mild): The lightest medical compression level. Good for minor swelling from travel, long shifts on your feet, or early pregnancy.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for everyday management of mild to moderate swelling and venous insufficiency.
- 30 to 40 mmHg (firm): Used for more significant swelling, often paired with wraps when the shape of the leg needs extra support. Typically requires a fitting or clinical guidance.
Put compression stockings on first thing in the morning before swelling has a chance to build. If you wait until your feet are already puffy, the stockings are harder to get on and less effective. For a quick alternative when you don’t have stockings, wrapping your foot and ankle snugly with an elastic bandage (starting at the toes and working up) can help in a pinch.
Activate Your Calf Muscles
Your calf muscles act as a pump for your veins. Every time they contract, they squeeze blood upward toward your heart. When you sit still for hours, that pump goes idle and fluid accumulates. Even small, low-effort movements can restart it.
Effective exercises you can do sitting or standing include heel raises (lifting your heels while keeping your toes on the floor), toe raises (lifting your toes while keeping your heels down), and ankle pumps (pointing your toes down, then flexing them up toward your shin). Doing these for a few minutes every hour makes a noticeable difference, especially during long flights, desk work, or car rides. If you’re able to walk, a 10 to 15 minute walk is one of the best ways to reduce foot swelling because it engages the full calf pump with every step.
Cut Back on Sodium
Sodium causes your body to hold onto water, and excess fluid tends to settle in your feet and ankles. Most people eat well over the amount their body needs. For managing fluid retention, keeping sodium under 2,000 mg per day is a common target. For context, a single fast-food meal can easily contain 1,500 mg or more.
The biggest sodium sources aren’t the salt shaker. They’re processed and packaged foods: canned soups, deli meats, frozen meals, sauces, bread, and restaurant dishes. Reading nutrition labels and cooking more meals at home gives you far more control. Potassium-rich foods like bananas, sweet potatoes, and leafy greens can help counterbalance sodium’s water-retaining effect, though the main lever is simply eating less salt.
Stay Hydrated (Yes, Really)
It sounds counterintuitive, but drinking enough water actually helps reduce swelling. When you’re dehydrated, your body holds onto the fluid it has, which can worsen puffiness. Staying well-hydrated signals your kidneys to release excess fluid rather than store it. There’s no magic number, but if your urine is pale yellow, you’re generally in good shape.
Check Your Medications
Several common medications cause foot and ankle swelling as a side effect. Blood pressure drugs called calcium channel blockers are among the most frequent culprits. The swelling is dose-related: at lower doses, ankle swelling affects 1 to 15% of people taking these medications, but at higher doses taken long-term, the rate can exceed 80%. Other medications that commonly cause fluid retention include certain diabetes drugs, steroids, hormone therapies (including estrogen and testosterone), and some antidepressants.
If your swelling started around the same time you began a new medication or had a dose increase, that connection is worth raising with your prescriber. In many cases, switching to a different drug in the same class or adjusting the dose resolves the problem. Don’t stop a prescribed medication on your own, but do flag the timing.
Cold Water and Cooling
Cold constricts blood vessels and can temporarily reduce swelling, especially if heat or inflammation is contributing. Soaking your feet in cool (not ice-cold) water for 15 to 20 minutes can bring relief. An ice pack wrapped in a towel and applied to the swollen area for 10 to 15 minutes works too. This is particularly helpful after a long day on your feet or in hot weather, when blood vessels dilate and allow more fluid to leak into surrounding tissue.
Magnesium and Diet
Low magnesium levels may contribute to fluid retention in some people. The recommended daily intake for adults ranges from 310 mg for women to 420 mg for men, and many people fall short through diet alone. Good food sources include nuts, seeds, dark chocolate, avocados, and whole grains. If you suspect your diet is low in magnesium, increasing these foods is a reasonable first step. Magnesium supplements are widely available, but getting it through food is generally better absorbed and less likely to cause digestive issues.
When Swelling Is a Warning Sign
Most foot swelling is harmless, caused by gravity, heat, salt, or standing too long. But certain patterns point to something that needs medical attention.
Swelling in only one leg is the most important red flag. When one foot or leg swells rapidly, especially over less than 72 hours, it may indicate a deep vein thrombosis (a blood clot). Signs that make a clot more likely include pain or tenderness in the calf, warmth over the swollen area, and redness or discoloration. This is particularly urgent if you’ve recently had surgery, been on a long flight, or are on hormonal birth control.
Swelling in both legs that develops gradually and doesn’t resolve with elevation can signal a systemic issue like heart, kidney, or liver disease. If you press a finger into the swollen area and the dent stays for several seconds before filling back in, that’s called pitting edema. A shallow 2 mm dent that bounces back immediately is grade 1, while a deep 8 mm dent that takes two to three minutes to rebound is grade 4 and warrants prompt evaluation.
Other signs to watch for include swelling that worsens over days despite home measures, skin that looks shiny, tight, or discolored, shortness of breath alongside leg swelling (which can indicate a heart or lung issue), or swelling accompanied by fever and redness (which may point to an infection).
Putting It All Together
For most people, reducing foot swelling comes down to a consistent daily routine rather than any single fix. Elevate when you can, move your ankles and calves regularly throughout the day, wear compression stockings if swelling is a recurring problem, and keep your sodium intake in check. These strategies work best in combination. Someone who elevates for 20 minutes but then sits motionless for six hours will see the swelling return. The goal is to keep fluid circulating rather than pooling, and that means building small habits (ankle pumps at your desk, a short walk after lunch, compression socks on travel days) into the rhythm of your day.