Swelling in the legs and feet happens when tiny blood vessels leak fluid into surrounding tissue faster than your body can reabsorb it. The good news: most everyday swelling responds well to a combination of elevation, movement, compression, and dietary changes. Here’s how each one works and how to get the most out of it.
Elevate Your Legs Above Your Heart
Elevation is the simplest and fastest way to get fluid moving out of swollen legs. Gravity pulled that fluid downward, and gravity can help drain it back. The key detail most people miss: your legs need to be above the level of your heart, not just propped on an ottoman. Lying on a couch or bed with pillows stacked under your calves and ankles is the easiest setup. Aim for about 15 minutes at a time, three to four times a day. If you only do it once before bed, you won’t see nearly as much benefit as spreading those sessions throughout the day.
Use Movement to Pump Fluid Upward
Your calf muscles act as a built-in pump for your veins and lymphatic system. Every time they contract, they squeeze fluid upward toward your heart. Sitting or standing still for hours shuts that pump off, which is why long flights and desk jobs are notorious for causing puffy ankles.
The most effective targeted exercise is the ankle pump: pull your toes up toward your shin, then point them down toward the floor. Repeat 5 to 10 times per set, and do several sets throughout the day. Walking, even a short loop around your house or office every 30 to 60 minutes, also activates the calf pump. If you’re stuck sitting, pressing the balls of your feet into the floor repeatedly mimics the same contraction. Cycling, swimming, and any activity that involves rhythmic leg movement all help.
Wear Compression Stockings
Compression stockings apply graduated pressure, tightest at the ankle and looser toward the knee, to prevent fluid from pooling. They come in different pressure levels measured in millimeters of mercury (mmHg), and choosing the right level matters.
- 15 to 20 mmHg (mild): Good for very early or minor swelling, long flights, and people new to compression who need to build tolerance. Often not enough for swelling that rebounds during the day.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for mild to moderate leg swelling, post-injury edema, and daily wear. This is the sweet spot for most people balancing effectiveness and comfort.
- 30 to 40 mmHg (firm): Used for more significant swelling, especially in the lower legs where gravitational load is higher, or when moderate compression isn’t holding the swelling down through the day.
- 40 to 50 mmHg and above: Reserved for severe cases and prescribed only after clinical assessment.
Put compression stockings on first thing in the morning before swelling has a chance to build. If your legs are already swollen when you put them on, the stockings won’t fit properly and may be uncomfortable. Elevating your legs for 15 minutes before putting them on can help.
Cut Back on Sodium
Sodium directly drives fluid retention. When you eat a salty meal, your blood sodium level rises and your body holds onto water to dilute it. Your kidneys can only concentrate sodium in urine to about two to two and a half times the level in your blood, so when sodium intake spikes, the extra fluid simply stays in your body until the kidneys can catch up. That retained water settles in the lowest points: your feet and ankles.
Most guidelines for people with swelling recommend keeping sodium below 2,000 mg per day. For context, a single fast-food meal can easily contain 1,500 mg or more. The biggest sources tend to be processed foods, canned soups, deli meats, soy sauce, and restaurant meals. Reading nutrition labels is the most practical first step, since sodium hides in foods that don’t taste particularly salty, like bread, cereal, and condiments.
Stay Well Hydrated
It sounds counterintuitive to drink more water when you’re retaining fluid, but dehydration actually makes the problem worse. When water intake is low, your kidneys struggle to excrete sodium efficiently because they can’t produce enough urine volume to flush it out. Your body then releases a hormone that conserves water at the expense of sodium excretion, trapping even more fluid in your tissues. Drinking enough water gives your kidneys the volume they need to clear excess sodium, which in turn reduces fluid retention. Plain water is ideal. Sugary drinks and alcohol can contribute to swelling through other mechanisms.
Check Your Medications
Several common medications cause leg and foot swelling as a side effect. Blood pressure drugs in the calcium channel blocker family are the most frequent culprits. The swelling is dose-related: at low doses, it affects 1 to 15% of people, but at higher long-term doses the rate can exceed 80%. Other medications known to cause swelling include certain diabetes drugs, steroids, hormone therapies like estrogen, and some anti-inflammatory pain relievers. If your swelling started or worsened after beginning a new medication, that connection is worth discussing with your prescriber. Adjusting the dose or switching to a different drug often resolves the problem.
Conditions That Cause Persistent Swelling
When swelling doesn’t respond to elevation, compression, and dietary changes, or when it’s getting progressively worse, an underlying medical condition may be driving it. Swelling in both legs often points to a systemic issue. Heart failure causes blood to back up in the veins because the heart isn’t pumping strongly enough. Kidney disease reduces your body’s ability to filter excess fluid and sodium. Liver cirrhosis lowers protein levels in the blood, and since blood proteins help hold fluid inside vessels, low levels let fluid leak into tissues. Chronic venous insufficiency, where the one-way valves in leg veins are damaged, allows blood to pool and fluid to seep out.
These conditions produce swelling that tends to be gradual, bilateral (both legs), and worse by the end of the day or after standing. Treatment depends on the cause. Managing the underlying condition, whether that means adjusting heart failure medications or addressing kidney function, is what ultimately controls the swelling long term.
When Swelling Is an Emergency
Swelling in one leg only, especially when accompanied by pain or cramping in the calf, skin that looks red or purple, and warmth in the affected area, can signal a deep vein thrombosis (blood clot). This requires urgent medical attention because a clot can break loose and travel to the lungs. A pulmonary embolism causes sudden shortness of breath, chest pain that worsens with deep breathing, a rapid pulse, dizziness, or coughing up blood. DVT sometimes produces no noticeable symptoms at all, which is why new, unexplained swelling in a single leg should always be evaluated promptly.
Putting It All Together
The most effective approach combines several strategies at once. Elevate your legs above your heart for 15 minutes, three to four times daily. Move your feet and calves regularly, especially during long periods of sitting. Wear compression stockings at the right pressure level, put on first thing in the morning. Keep sodium under 2,000 mg per day and drink enough water to help your kidneys clear the excess. Review your medication list for known offenders. If the swelling is new, one-sided, painful, or not improving with these measures, get it evaluated to rule out a clot or an underlying condition that needs its own treatment.