Swollen ankles usually respond well to a combination of elevation, compression, movement, and dietary changes. For mild, occasional swelling caused by standing too long, sitting on a flight, or hot weather, home strategies can make a noticeable difference within hours. Persistent or sudden swelling, especially in one leg, needs medical evaluation because it can signal a circulatory problem that home care won’t fix.
Elevate Your Legs Above Your Heart
The single most effective thing you can do right now is lie down and prop your legs up on pillows so your ankles sit above the level of your heart. This position uses gravity to drain fluid back toward your core instead of letting it pool in your lower legs. Even 15 to 20 minutes in this position can visibly reduce mild swelling. If your ankles swell regularly, try to elevate them several times throughout the day, not just at bedtime.
Use Compression Stockings
Compression stockings apply graduated pressure to your lower legs, gently squeezing fluid upward. They come in different pressure levels measured in millimeters of mercury (mmHg), and choosing the right level matters.
- 15 to 20 mmHg is the lightest medical grade. It works well for very mild or early swelling, long flights, and days when you’ll be on your feet.
- 20 to 30 mmHg is considered moderate compression and covers most mild to moderate lower leg swelling.
- 30 to 40 mmHg is firm compression, typically reserved for more significant swelling that doesn’t improve with lighter stockings.
Start with the 15 to 20 mmHg range if you’re buying them on your own. Higher levels generally require guidance from a healthcare provider to make sure the pressure is appropriate for your circulation. Put them on first thing in the morning before swelling builds up during the day.
Move Your Ankles and Walk
Your calf muscles act as a pump for blood returning to your heart. When you sit or stand still for long stretches, that pump stalls and fluid accumulates around your ankles. Even small movements help.
Ankle pumps are the simplest exercise you can do from a bed or chair. Sit with your legs extended, then alternate between pointing your toes toward your knees and pointing them away from you, going as far as you comfortably can in each direction. Do this for two to three minutes, and repeat two to three times per hour when you’re sitting for long periods. Walking, cycling, and swimming all activate the calf pump more vigorously and are good daily habits if you’re prone to swelling.
Cut Back on Salt
Sodium causes your body to hold onto water, and excess fluid tends to settle in your ankles and feet. Keeping your daily sodium intake around 2,000 mg or less can reduce fluid retention significantly. For context, a single fast food meal can easily contain 1,500 mg or more.
The biggest sources of hidden sodium are processed foods, canned soups, deli meats, sauces, and restaurant meals. Reading nutrition labels and cooking more meals at home gives you far more control. Increasing your potassium intake through foods like bananas, sweet potatoes, and leafy greens also helps your kidneys flush excess sodium.
Check Your Medications
Several common medications cause ankle swelling as a side effect. Blood pressure drugs called calcium channel blockers are among the most frequent culprits. The incidence of ankle swelling with these drugs ranges from about 1% to 15% at standard doses, and it can exceed 80% in people taking high doses long term. Unlike typical fluid retention, these medications cause swelling by shifting fluid from blood vessels into surrounding tissue, which is why water pills don’t always help.
Certain pain relievers, diabetes medications, and hormone therapies can also contribute. If your ankle swelling started or worsened after beginning a new medication, bring it up with your prescribing provider. Adjusting the dose or switching to a different drug in the same class often resolves the problem.
Why Ankles Swell in the First Place
Gravity pulls blood and fluid downward throughout the day, and your veins have one-way valves that push blood back up toward your heart. When those valves weaken or become damaged, blood pools in your lower legs. This raises pressure inside the veins until fluid leaks out into the surrounding tissue, causing visible swelling. This process, called chronic venous insufficiency, is one of the most common reasons for ongoing ankle swelling, particularly in people over 50.
Other systemic causes include heart failure, kidney disease, and liver disease, all of which affect how your body manages fluid balance. Pregnancy, prolonged sitting, and excess body weight also increase pressure on the veins in your legs. Even hot weather can do it, because heat causes blood vessels to widen and fluid to shift toward the surface.
How to Tell If Swelling Is Serious
You can get a rough sense of severity by pressing your thumb into the swollen area for about ten seconds and watching what happens when you release. If the skin bounces back immediately with barely a dent (grade 1), the swelling is mild. If the indent is deep and takes 15 seconds to a minute to fill back in (grade 3), or leaves an 8 mm pit that lingers for two to three minutes (grade 4), the swelling is more significant and worth investigating.
Swelling in just one ankle deserves prompt attention because it can indicate a blood clot in the deep veins of your leg. Watch for warmth, redness, or tenderness concentrated in one calf or ankle.
Seek emergency care if ankle swelling comes with shortness of breath, chest tightness or pain, coughing up blood, a rapid or pounding heartbeat, or feeling faint and clammy. These symptoms together can signal a blood clot that has traveled to the lungs.
When Home Care Isn’t Enough
If your ankles stay swollen despite consistent elevation, compression, movement, and lower sodium intake, the underlying cause likely needs treatment. Diuretics (water pills) are effective for swelling driven by heart, kidney, or liver conditions, but they don’t help with every type of edema and aren’t meant for long-term use without monitoring.
For people with chronic venous insufficiency, a class of plant-based supplements called phlebotonics can modestly reduce swelling. Horse chestnut seed extract, in particular, has moderate evidence supporting its ability to slightly reduce leg swelling and is generally considered safe. Your provider may also recommend procedures to address damaged vein valves if compression and lifestyle changes aren’t controlling the problem.
Persistent swelling that doesn’t respond to any of these measures, or that gets progressively worse over weeks, typically calls for blood work, an ultrasound of the leg veins, or imaging of the heart to identify the root cause.