Swollen ankles respond well to a combination of elevation, compression, movement, and dietary changes. The right approach depends on what’s causing the swelling, whether it’s mild or severe, and whether it affects one leg or both. Most cases of bilateral ankle swelling improve significantly with consistent home strategies, while some require medical treatment to address an underlying cause.
Elevation: The Simplest Starting Point
Raising your legs at or above heart level improves venous circulation by reducing the pressure that keeps fluid pooled in your lower legs. You don’t need to prop them straight up in the air. A 15-degree angle, roughly the height of two or three stacked pillows while lying down, is enough to encourage fluid drainage and is more comfortable than steeper angles. In fact, hospital research found that patients elevated at 15 degrees reported significantly better comfort than those at 30 degrees, with meaningful improvement either way.
Try to elevate for 20 to 30 minutes several times a day, especially after long periods of sitting or standing. Consistency matters more than duration. Three short elevation sessions spread throughout the day will do more than one long session at night.
Compression Stockings
Compression socks apply gentle, graduated pressure that helps push fluid back up toward your heart. They come in different pressure ratings measured in mmHg, and the right level depends on how swollen your ankles are.
- 15 to 20 mmHg: Available over the counter. Effective for mild, everyday swelling that goes away overnight.
- 20 to 30 mmHg: Better for moderate swelling, visible varicose veins, or pitting that lasts several seconds when you press on it. Your doctor may need to recommend this level.
Put compression socks on first thing in the morning before swelling has a chance to build up. They work best as prevention, not just treatment. If you put them on after your ankles are already puffy, they’ll still help, but the effect is smaller.
Ankle Pumps and Calf Exercises
Your calf muscles act as a pump for your veins, squeezing blood back up toward your heart with every contraction. When you sit or stand still for hours, that pump stalls and fluid accumulates. Simple ankle pump exercises restart it.
Sit or lie down with your legs extended. Point your toes toward your knees as far as you can, then point them away from you. Alternate back and forth for two to three minutes, and repeat two to three times per hour when you’re sedentary. This is especially useful on long flights, during desk work, or while recovering from surgery. Walking is even better when it’s an option, since each step activates the full calf pump cycle.
Cutting Back on Sodium
Sodium causes your body to hold onto extra water, and that fluid tends to settle in the lowest point: your ankles. Reducing your daily sodium intake to under 2,000 mg is the threshold recommended by most major heart and health organizations for people dealing with fluid retention. For context, the average American consumes over 3,400 mg per day, so there’s usually significant room to cut back.
The biggest sources aren’t the salt shaker. Processed foods, canned soups, deli meats, restaurant meals, and sauces account for most dietary sodium. Reading nutrition labels and cooking more meals at home are the two most practical steps. Potassium-rich foods like bananas, sweet potatoes, and leafy greens can help counterbalance sodium’s fluid-retaining effects.
Magnesium Supplements
Magnesium deficiency is linked to increased fluid retention, and supplementation may help reduce swelling. Cleveland Clinic recommends 200 to 400 mg of magnesium per day as a starting point for ankle swelling relief. Magnesium is also available through foods like nuts, seeds, dark chocolate, and spinach, but supplementation is a more reliable way to hit therapeutic levels if you’re already deficient. People with kidney or heart conditions should check with a doctor before starting magnesium supplements, since the kidneys regulate magnesium levels and impaired function changes the equation.
When Medications Cause the Swelling
A common and often overlooked cause of swollen ankles is a class of blood pressure medications called calcium channel blockers. These drugs, which include amlodipine and nifedipine, can cause fluid to leak from capillaries into surrounding tissue. The incidence ranges from 1 to 15% at standard doses but can exceed 80% in patients on high doses long term.
What makes this tricky is that the swelling isn’t from retaining extra fluid. It’s from fluid redistributing into the tissue around your ankles. That’s why diuretics (water pills) often don’t help with this particular type of swelling. If your ankle swelling started or worsened after beginning a new medication, that connection is worth raising with your prescriber. Dose adjustments or switching to a different medication often resolves it. Other medications that can contribute to ankle swelling include certain diabetes drugs, steroids, and hormone therapies.
Prescription Diuretics
When home remedies aren’t enough, doctors sometimes prescribe diuretics to help your kidneys flush out excess fluid. These work by blocking sodium reabsorption at different points in the kidney, which pulls water out with it. Loop diuretics are the most powerful and are typically used for more significant fluid retention, while milder options are used for less severe cases.
Diuretics are a tool for managing the symptom, not fixing the cause. They’re most appropriate when swelling is related to heart failure, kidney problems, or liver disease, and they come with their own considerations, including electrolyte imbalances and dehydration. Your doctor will monitor bloodwork if you’re on them regularly.
Swollen Ankles During Pregnancy
Some ankle swelling is normal during pregnancy, especially in the third trimester. Safe strategies include staying off your feet when possible, lying down with your legs elevated, doing ankle circles while seated, and standing or walking in a pool, which naturally compresses leg tissue. Drinking about 10 cups (2.3 liters) of fluid daily and avoiding clothes with tight bands around the ankles or calves also helps.
Sudden swelling is a different story. If swelling rapidly worsens, or if you notice sudden puffiness in your face or hands, this could signal preeclampsia, a serious blood pressure condition that requires immediate medical attention. Painful swelling in just one leg during pregnancy may indicate a blood clot.
How to Gauge Severity
Doctors assess swelling using a pitting edema scale. You can do a basic version at home by pressing your thumb firmly into the swollen area for a few seconds, then releasing.
- Grade 1: A shallow 2 mm dent that bounces back immediately. This is mild.
- Grade 2: A 3 to 4 mm dent that refills in under 15 seconds.
- Grade 3: A 5 to 6 mm dent that takes 15 to 60 seconds to refill.
- Grade 4: An 8 mm dent that takes two to three minutes to refill. This is severe and warrants prompt medical evaluation.
Bilateral swelling (both ankles) is usually related to systemic causes like prolonged standing, salt intake, medication side effects, or heart and kidney issues. Unilateral swelling (one ankle only) is more concerning. A single swollen leg that’s also warm, painful, or red could indicate a deep vein thrombosis, a blood clot that can travel to the lungs and become life-threatening. Other DVT signs include visible veins near the skin’s surface and pain that worsens when walking or standing. If a clot does travel to the lungs, it can cause chest pain, shortness of breath, coughing up blood, or fainting. This is a medical emergency.