Swollen ankles and feet usually respond well to a combination of elevation, movement, dietary changes, and compression. The swelling itself, called edema, happens when fluid leaks out of your blood vessels and collects in the tissue around your ankles and feet, where gravity pulls it. Reducing that fluid buildup is straightforward in most cases, but certain warning signs mean the swelling needs medical attention rather than home remedies.
Why Fluid Pools in Your Feet
Your circulatory system constantly moves fluid between your blood vessels and the surrounding tissue. Swelling occurs when that balance tips in one of several ways: pressure inside the blood vessels gets too high, the vessel walls become too permeable, or your lymphatic system can’t drain fluid fast enough. Sitting or standing for long periods makes it worse because gravity steadily pulls fluid downward into your feet and ankles, and without muscle movement, there’s nothing pushing it back up.
This is why the most effective strategies all target the same goal: helping fluid move out of your lower legs and back into circulation.
Elevate Your Legs Above Your Heart
Elevation is the simplest and fastest way to reduce ankle swelling. The key detail most people get wrong is height. Your feet need to be above the level of your heart, not just propped on an ottoman. Lying on a couch or bed with your legs resting on a stack of pillows works well. Aim for about 15 minutes per session, three to four times a day. You’ll often notice a visible difference after a single session, but consistent daily elevation prevents fluid from re-accumulating.
Use Ankle Pumps to Activate Your Calf Muscles
Your calf muscles act as a pump for your veins, squeezing blood upward toward your heart each time they contract. When you sit still for hours, that pump goes idle and fluid pools. Ankle pumps are a simple exercise that reactivates it: point your toes down, then pull them back up toward your shin, alternating back and forth.
A systematic review of ankle pump exercises found that the most effective frequency is one pump every three to four seconds. That’s a comfortable, rhythmic pace you can maintain while sitting at a desk, watching television, or riding in a car. Even short bursts of this movement throughout the day meaningfully improve blood flow in the lower legs. Walking is equally effective since every step naturally engages the calf pump, so regular short walks beat prolonged sitting or standing.
Cut Back on Sodium
Sodium makes your body hold onto water, and excess sodium is one of the most common dietary drivers of swelling. For people actively dealing with edema, medical guidelines suggest keeping daily sodium intake between roughly 1,375 and 1,800 milligrams. To put that in perspective, the average American consumes over 3,400 milligrams per day, and a single fast-food meal can exceed 2,000 milligrams on its own.
Most of the sodium in your diet comes from processed and restaurant food, not from the salt shaker. Canned soups, deli meats, frozen meals, soy sauce, and bread are some of the biggest contributors. Reading nutrition labels and cooking more meals at home gives you direct control over how much sodium you take in. Many people see a noticeable reduction in puffiness within a few days of cutting back.
Stay Hydrated
It sounds counterintuitive, but drinking enough water actually reduces fluid retention. When you’re dehydrated, your body responds by holding onto more fluid and sodium as a protective measure. Staying well-hydrated signals that there’s no shortage, so your kidneys release excess fluid more freely. Plain water is ideal. There’s no magic number that works for everyone, but pale yellow urine is a reliable sign you’re drinking enough.
Compression Stockings and Socks
Compression garments apply graduated pressure to your lower legs, tightest at the ankle and looser toward the knee, which physically pushes fluid upward and prevents it from pooling. They come in different pressure levels measured in mmHg:
- 15 to 20 mmHg (mild): Good for very early or mild swelling, long flights, and people who stand all day. Available without a prescription.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for mild to moderate edema. Often recommended for everyday use after swelling has been reduced.
- 30 to 40 mmHg (firm): Used for more significant swelling, including stage II lymphedema. Typically requires a fitting or prescription.
For most people dealing with occasional swollen ankles, the mild or moderate range is sufficient. Put them on in the morning before swelling starts for the day, since they’re designed to prevent fluid from accumulating rather than squeeze out fluid that’s already there.
Choose the Right Footwear
Shoes that constrict blood flow or press on sensitive areas can make swelling worse. If your feet tend to swell during the day, look for shoes with extra depth and wide widths so your foot has room to expand. Stretchable uppers made from flexible materials accommodate changes in size throughout the day. Adjustable closures like velcro straps or elastic laces let you loosen the fit when swelling peaks and tighten it when swelling subsides.
A wide toe box prevents pinching, and supportive insoles distribute your weight more evenly so pressure doesn’t concentrate in one area. Avoid stiff leather shoes or narrow styles that lock your foot into a fixed shape. If swelling affects your balance, slip-resistant outsoles add a margin of safety.
When Medications Are Needed
When lifestyle measures aren’t enough, doctors may prescribe diuretics, which help your kidneys flush out excess sodium and water. Several types exist, and your doctor chooses based on the underlying cause of the swelling and how your body responds. These medications can be very effective but require monitoring because they also affect your electrolyte levels. If a medication you’re currently taking is causing the swelling (some blood pressure drugs, anti-inflammatory medications, and diabetes drugs are known culprits), your doctor may adjust your prescription instead.
Swelling That Needs Medical Attention
Most ankle swelling is harmless, but certain patterns signal something more serious. Swelling in only one leg, especially when accompanied by pain, warmth, or skin discoloration, can indicate a deep vein thrombosis (a blood clot in the leg). DVT can sometimes occur without obvious symptoms, but when it does cause signs, they typically include cramping or soreness that starts in the calf, redness or purple discoloration, and a feeling of warmth in the affected leg. If a clot breaks loose and travels to the lungs, it causes sudden shortness of breath, chest pain that worsens with breathing, dizziness, or coughing up blood. That’s a medical emergency.
During pregnancy, some ankle swelling is normal, but sudden or severe swelling in the hands, ankles, and face can be an early sign of preeclampsia, a condition marked by high blood pressure and protein in the urine. Other warning signs include severe headaches that won’t go away, blurry vision, dark spots in your vision, sharp abdominal pain (particularly on the right side), and shortness of breath. Any of those symptoms during pregnancy warrant immediate medical evaluation.
Swelling that develops gradually in both legs and doesn’t improve with elevation may point to heart, kidney, or liver problems, all of which affect the body’s ability to manage fluid balance. Persistent or worsening swelling that doesn’t respond to the strategies above is worth discussing with a doctor to rule out an underlying cause.