Ankle swelling happens when excess fluid pools in the tissues around your ankles and feet, typically because gravity pulls fluid downward and your body can’t circulate it back efficiently. The good news: most everyday ankle swelling responds well to simple habits you can build into your routine. Keeping sodium under 2,300 milligrams a day, wearing the right compression level, and elevating your legs above heart level for 15 minutes several times daily can make a noticeable difference.
Why Fluid Pools in Your Ankles
Your body constantly moves fluid between your bloodstream and surrounding tissues. Swelling occurs when that balance tips in favor of fluid leaking out and staying out. This can happen through several mechanisms: pressure inside your blood vessels gets too high, the vessels become more permeable, your lymphatic system can’t drain efficiently, or your blood doesn’t carry enough protein to pull fluid back in. Your ankles sit at the lowest point of your body when you’re upright, so they bear the brunt of gravity’s effect on all of these processes.
Common triggers for everyday bilateral swelling (both ankles) include prolonged standing or sitting, high sodium intake, hormonal fluctuations during menstruation or pregnancy, and heat. Certain medications are also well-known culprits, including calcium channel blockers like amlodipine and nifedipine, corticosteroids, NSAIDs, gabapentin, pregabalin, hormone therapies, and some blood pressure drugs like beta blockers and hydralazine. If your swelling started or worsened after beginning a new medication, that connection is worth raising with whoever prescribed it.
Cut Back on Sodium
Sodium causes your body to hold onto water. The more sodium circulating in your blood, the more fluid your kidneys retain to keep concentrations balanced, and some of that extra fluid ends up in your tissues. The Dietary Guidelines for Americans recommend keeping sodium below 2,300 milligrams per day for adults. For context, a single teaspoon of table salt contains about 2,300 mg, and the average American consumes well over 3,400 mg daily.
Most excess sodium doesn’t come from the salt shaker. It hides in processed foods, restaurant meals, canned soups, deli meats, bread, cheese, and condiments. Reading nutrition labels and cooking more meals at home gives you the most control. Increasing your potassium intake through foods like bananas, sweet potatoes, and leafy greens also helps your kidneys excrete sodium more effectively.
Elevate Your Legs the Right Way
Elevation works by reversing gravity’s pull, letting fluid drain from your ankles back toward your core. 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 your back with your legs resting on a stack of pillows or against a wall gets you to the right angle. Aim for about 15 minutes per session, three to four times a day. If you spend long hours on your feet or notice swelling worsening by evening, an elevation session in the afternoon and another before bed can help reset fluid distribution.
Use Compression Stockings
Compression stockings apply graduated pressure to your lower legs, squeezing tightest at the ankle and loosening as they move upward. This design helps push fluid back into your veins and prevents it from settling into your tissues. They come in several pressure grades measured in millimeters of mercury (mmHg), and choosing the right level matters.
- 15 to 20 mmHg (mild): The lightest medical compression level, available over the counter. Good for mild daily swelling, long flights, and jobs that involve standing.
- 20 to 30 mmHg (moderate): The most commonly prescribed daytime level for moderate swelling and maintenance after more intensive treatment.
- 30 to 40 mmHg (firm): A higher therapeutic level used for more significant chronic swelling or venous insufficiency, typically after a clinical assessment.
For prevention purposes, 15 to 20 mmHg stockings are a reasonable starting point. Put them on first thing in the morning before swelling starts, since they’re harder to pull on over already-swollen ankles and less effective once fluid has accumulated. Knee-high styles work well for ankle swelling specifically.
Move Frequently Throughout the Day
Your calf muscles act as a pump, squeezing veins and pushing blood back toward your heart with every step or flex. When you sit or stand still for long stretches, that pump goes idle, and fluid accumulates. Breaking up sedentary time doesn’t require a full workout. Walking for a few minutes every hour, doing calf raises at your desk, or simply flexing and pointing your feet repeatedly activates that pump mechanism.
If your job keeps you in a chair, try ankle circles and toe raises under your desk. If you stand for long periods, shifting your weight, walking in place, and taking short seated breaks all help. The goal is consistent movement rather than intensity.
Preventing Swelling During Travel
Long flights and car rides create a perfect storm for ankle swelling: cramped positioning, low cabin humidity, reduced movement, and cabin pressure changes on planes. Try to move your muscles every 15 to 20 minutes. March in place, do ankle rotations, or flex your calves while seated. On flights, choose an aisle seat when possible so you can stand and walk the cabin periodically.
Wearing mild compression stockings (15 to 20 mmHg) for the duration of the trip makes a real difference, especially on flights over four hours. Stay hydrated with water rather than alcohol or caffeine, both of which can promote dehydration and paradoxically worsen fluid retention. Avoid crossing your legs, which restricts circulation at the knees.
Stay Hydrated and Maintain a Healthy Weight
It sounds counterintuitive, but drinking enough water actually helps reduce swelling. When you’re dehydrated, your body holds onto more sodium and fluid as a protective response. Consistent water intake helps your kidneys flush excess sodium and maintain fluid balance.
Carrying extra body weight increases pressure on your veins and makes it harder for blood to travel efficiently from your legs back to your heart. Even modest weight loss can reduce the venous pressure that contributes to chronic ankle swelling. Regular physical activity serves double duty here: it supports weight management while keeping your calf muscle pump active.
When Ankle Swelling Signals Something Serious
Most ankle swelling is benign and responds to the strategies above. But certain patterns warrant prompt medical attention. Swelling in only one leg, especially if it comes on suddenly with pain, warmth, or redness, is the hallmark presentation of a deep vein thrombosis (blood clot). This is a medical emergency because the clot can travel to your lungs.
Swelling in both legs that comes with shortness of breath, difficulty breathing while lying flat, unusual fatigue, or abdominal bloating can point to heart failure. Chronic venous insufficiency, the most common cause of persistent bilateral leg swelling, develops gradually and often comes with skin changes, varicose veins, or a heavy, aching feeling in the legs that worsens over the day.
Other conditions that cause chronic swelling include kidney disease, liver disease, thyroid disorders, lymphedema (especially after cancer treatment involving lymph node removal or radiation), and sleep apnea. If your swelling doesn’t improve with lifestyle measures, keeps getting worse, or appears alongside other new symptoms, the underlying cause needs to be identified before prevention strategies alone will work.