Leg swelling from fluid buildup, known as edema, responds well to a combination of movement, positioning, dietary changes, and sometimes compression or medication. The key principle behind all of these strategies is the same: help your body move fluid out of the tissue between your cells and back into your bloodstream, where your kidneys can process it normally.
Fluid accumulates in your legs when the pressure inside your blood vessels pushes more liquid into surrounding tissue than your lymphatic system can drain back. Gravity makes this worse in the lower body, which is why swelling tends to be most noticeable in your feet and ankles by the end of the day. The strategies below target different parts of this process.
Elevate Your Legs Above Your Heart
The simplest and most immediate way to reduce leg swelling is elevation. Position your legs so they rest above the level of your heart, which reverses the gravitational pull that pools fluid in your lower body. Lying on a couch or bed with pillows stacked under your calves works well. Aim for about 15 minutes per session, and repeat several times throughout the day if swelling is persistent.
Elevation works best as a daily habit rather than a one-time fix. If you notice swelling worsening in the afternoon or evening, scheduling a midday elevation break can make a noticeable difference.
Use Your Calf Muscles as a Pump
Your calf muscles act as a built-in pump for pushing blood and fluid back up toward your heart. Every time these muscles contract, they squeeze the veins in your lower legs and force fluid upward against gravity. When you sit or stand still for long stretches, this pump goes idle and fluid accumulates.
You don’t need intense exercise to activate it. Simple calf raises are one of the most effective options: stand near a wall for balance, place your feet hip-width apart, and press into the balls of your feet to lift your heels off the ground. Lower slowly and repeat. If standing is uncomfortable, you can do seated calf raises by sitting in a sturdy chair with your feet flat on the floor, then pressing down through the balls of your feet to raise your heels as high as possible. Adding light hand pressure on your thighs near your knees increases the resistance.
Walking, hiking (especially uphill), swimming, and dancing all work the calves consistently. Even short walks of 10 to 15 minutes several times a day can keep the pump active enough to prevent fluid from settling. If you work at a desk, try doing a set of seated calf raises every hour or getting up for a brief walk. Standing desks help some people, but standing completely still can actually increase swelling. The goal is regular movement, not just a change in position.
Cut Back on Sodium
Sodium causes your body to hold onto water. When you eat more salt than your kidneys can quickly process, the extra sodium pulls fluid into your bloodstream and tissues, worsening swelling. For people with edema, the recommended daily sodium intake is between 1,375 and 1,800 milligrams, according to Georgetown University’s nephrology guidelines. That’s significantly lower than the 3,400 milligrams most Americans consume daily.
The biggest sources of hidden sodium are processed and packaged foods: canned soups, deli meats, frozen meals, bread, sauces, and restaurant dishes. Reading nutrition labels and cooking more meals at home gives you the most control. Seasoning with herbs, spices, citrus, and vinegar can replace a lot of the flavor you’d otherwise get from salt. Most people notice a reduction in swelling within a few days of cutting sodium intake meaningfully.
Stay Hydrated
It sounds counterintuitive, but drinking enough water actually helps reduce fluid retention. When you’re dehydrated, your body holds onto the fluid it has more aggressively, which can worsen swelling. Staying well-hydrated signals to your kidneys that it’s safe to release excess fluid. There’s no magic number of glasses per day, but consistent water intake throughout the day, rather than large amounts at once, keeps your fluid balance steady.
Compression Stockings
Compression stockings apply graduated pressure to your legs, with the tightest squeeze at the ankle and decreasing pressure moving upward. This external pressure helps push fluid back into your veins and prevents it from pooling in the tissue.
They come in several pressure levels, measured in millimeters of mercury (mmHg):
- 15 to 20 mmHg (mild): Suitable for minor swelling, tired legs, or prevention during long flights and car rides.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for mild to moderate edema. This is where most people with recurring leg swelling start.
- 30 to 40 mmHg (firm): Used for more significant swelling, often in cases of chronic venous insufficiency or lymphedema. These typically require a prescription or professional fitting.
Put compression stockings on first thing in the morning, before gravity has had a chance to pull fluid into your legs. They’re most effective when worn throughout the day and removed at bedtime.
When Medication Becomes Necessary
If lifestyle changes aren’t enough, your doctor may prescribe a diuretic, commonly called a water pill. These medications work by preventing your kidneys from reabsorbing salt, which causes you to excrete more sodium and water through urine. Different types target different parts of the kidney: some are more potent for people with reduced kidney function, while others are designed to prevent excessive potassium loss, which is a common side effect of stronger diuretics.
Diuretics are typically prescribed when the swelling is tied to an underlying condition like heart failure, kidney disease, or liver problems. They’re not a first-line solution for the kind of mild, gravity-related swelling that most people experience from sitting or standing too long. The underlying cause of your edema determines which approach is appropriate.
What Causes the Swelling Matters
Mild, symmetric swelling in both legs that worsens with prolonged sitting or standing and improves with elevation is usually benign. It’s common during pregnancy, after long flights, in hot weather, and as a side effect of certain medications (particularly blood pressure drugs and anti-inflammatory painkillers).
Chronic venous insufficiency, where the valves in your leg veins weaken and allow blood to flow backward, is one of the most common medical causes of persistent leg swelling. Cardiologists evaluate and treat leg edema more than any other specialty, largely because heart failure is another frequent cause. In heart failure, the heart’s reduced pumping ability raises pressure in the veins, which forces more fluid out of the capillaries and into surrounding tissue.
Swelling That Needs Urgent Attention
Swelling in only one leg is a different situation. A deep vein thrombosis, or blood clot in a deep leg vein, can cause swelling along with pain or cramping that often starts in the calf, a feeling of warmth in the affected leg, and skin color changes (redness or a purplish hue). DVT can also occur without noticeable symptoms, which is why sudden, unexplained one-sided swelling warrants prompt medical evaluation.
A blood clot becomes dangerous if it breaks free and travels to the lungs, causing a pulmonary embolism. Warning signs include sudden shortness of breath, chest pain that worsens with deep breathing or coughing, dizziness or fainting, a rapid pulse, and coughing up blood. These symptoms require emergency care.