Fluid buildup in the ankles, known as peripheral edema, responds well to a combination of elevation, movement, and dietary changes. Most people notice visible improvement within hours of starting these strategies, though persistent or one-sided swelling needs medical evaluation. Here’s what actually works and why.
Elevate Your Legs Three Times a Day
Gravity is both the cause and the cure. When you stand or sit for long periods, fluid pools in your lower legs because your veins have to fight gravity to push blood back toward your heart. Elevating your legs reverses that equation. Lie down and prop your ankles on pillows so they sit above the level of your chest. Research on patients with venous-related edema found that performing leg-raise exercises three times a day for 20 minutes each session significantly reduced lower leg swelling compared to a control group.
The key detail most people miss: your ankles need to be higher than your heart, not just slightly raised on a footstool. Reclining on a couch with your feet on the armrest works. So does lying on your bed with two or three pillows under your calves. If you can only manage one session a day, do it in the evening when fluid has had all day to accumulate.
Use Ankle Pumps to Activate Your Calf Muscles
Your calf muscles act as a built-in pump for your veins. Every time they contract, they squeeze blood and fluid upward toward your heart. When you sit still for hours, that pump goes idle, and fluid backs up into your ankles. Ankle pump exercises restart it.
The movement is simple: point your toes down as far as they’ll go, then pull them up toward your shin as far as they’ll go. That’s one rep. Research comparing different speeds found that a pace of about 30 repetitions per minute (holding each position for roughly one second) was both effective and comfortable for most people. Five minutes at this pace gives you 150 pumps, which is enough to meaningfully boost circulation in your lower legs. You can do these while sitting at your desk, watching TV, or during a long flight.
Walking is another powerful activator of the calf pump. Even a five-minute walk every hour makes a noticeable difference if your job keeps you seated most of the day.
Cut Back on Sodium
Sodium is the single biggest dietary driver of fluid retention. It works by a straightforward mechanism: when you eat more salt, your kidneys respond by holding onto more water to keep your blood chemistry balanced. One study found that increasing salt intake from 6 grams to 12 grams per day caused the body to retain an extra 540 milliliters of water daily. That’s over two cups of fluid your body holds onto instead of excreting.
The FDA and the Dietary Guidelines for Americans recommend keeping sodium under 2,300 milligrams per day, which is about one teaspoon of table salt. Most Americans consume well over that, largely from processed and restaurant foods. Canned soups, deli meats, frozen meals, soy sauce, and bread are some of the biggest hidden sources. Reading nutrition labels and cooking more meals at home are the most reliable ways to bring your intake down. Many people see their ankle swelling decrease noticeably within a few days of reducing sodium.
Try Manual Lymphatic Drainage
Your lymphatic system is a secondary drainage network that runs alongside your veins, carrying excess fluid out of your tissues. When it gets sluggish, fluid lingers in your ankles and feet. Manual lymphatic drainage is a self-massage technique that helps push that fluid along, and you can do it at home.
The critical difference from regular massage: you need very light pressure. Firm, deep strokes actually compress the lymphatic vessels and block flow. Instead, use just enough pressure to gently stretch the skin. Start at the ankle by placing your hands behind the ankle bones and lightly pulling the skin upward toward your knee. Then move to the top of the foot, stretching the skin toward the ankle. For the toes, wrap your fingers around each one and gently pull the skin toward the ankle. Always stroke in the direction of your heart, working from the farthest point (toes) back toward the thigh.
Check Your Medications
Several common prescription drugs cause ankle swelling as a side effect. Calcium channel blockers, frequently prescribed for high blood pressure (including amlodipine and nifedipine), are among the most common culprits. These drugs widen the small arteries that feed your capillaries, which increases pressure inside the capillary beds and pushes fluid into surrounding tissue. Some diabetes medications, particularly pioglitazone, cause edema through a combination of increased blood vessel permeability and sodium retention in the kidneys.
If your ankle swelling started or worsened after beginning a new medication, that connection is worth discussing with your prescriber. Stopping or switching the medication often resolves the swelling entirely. Don’t discontinue a prescribed medication on your own, but do flag the timing.
Drink More Water, Not Less
It sounds counterintuitive, but drinking more water can help reduce fluid retention. When you’re mildly dehydrated, your body shifts into conservation mode, holding onto water more aggressively. Staying well-hydrated signals your kidneys that there’s plenty of water available, which makes them more willing to excrete the excess rather than stockpile it. This is especially true when you’re also reducing sodium, since adequate water intake helps your kidneys flush out the extra salt that’s been driving the retention in the first place.
Compression Socks for Ongoing Swelling
Graduated compression socks apply the most pressure at the ankle and gradually decrease up the calf, which physically prevents fluid from settling into your lower legs. They’re most effective when you put them on first thing in the morning, before fluid has had a chance to pool. For mild, everyday swelling, 15 to 20 mmHg compression is a good starting point and doesn’t require a prescription. Higher compression levels (20 to 30 mmHg or above) are available but work best when fitted by a professional.
Compression is particularly helpful for people who stand or sit for long shifts, for air travel, and for anyone with chronic venous insufficiency where the valves in the leg veins don’t close properly.
When Ankle Swelling Signals Something Serious
The pattern of your swelling carries important diagnostic information. Swelling in both ankles is most commonly caused by venous insufficiency, excess sodium, prolonged sitting, or medication side effects. Swelling in just one ankle is a different situation. Acute swelling in a single leg, especially with warmth, redness, or tenderness, can indicate a deep vein thrombosis (a blood clot), which needs urgent medical attention.
Chronic one-sided swelling that develops slowly over weeks or months is more often related to long-standing venous insufficiency or a lymphatic problem on that side. Bilateral swelling can also point to systemic issues like heart failure, kidney disease, or liver disease, particularly when it comes on gradually and doesn’t respond to elevation and salt reduction.
You can check the severity of your swelling with a simple test: press your thumb firmly into the skin over your ankle bone for about five seconds, then release. If the indentation springs back immediately and is barely visible (2 mm deep), that’s grade 1 pitting edema, the mildest form. If it leaves a deep dent of 8 mm or more that takes two to three minutes to refill, that’s grade 4, which typically reflects a more significant underlying cause. Swelling that’s grade 3 or 4, that doesn’t improve with elevation and salt reduction within a week, or that’s accompanied by shortness of breath or chest pain warrants medical investigation.