Swollen feet and ankles usually result from fluid pooling in your lower legs due to gravity, and most cases improve with a combination of elevation, movement, compression, and dietary changes. The strategies below work for the everyday swelling that comes from standing too long, sitting through a flight, or retaining water. If your swelling is sudden, painful, or only in one leg, skip to the warning signs section first.
Elevate Your Legs Above Your Heart
Elevation is the fastest way to move trapped fluid out of your feet and ankles. 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 works well. Aim for about 15 minutes at a time, three to four times a day. Even one session can produce noticeable relief, but consistency throughout the day prevents fluid from re-accumulating.
If you work at a desk, elevating during lunch and again after work makes a significant difference. At night, placing a pillow under your calves while you sleep keeps fluid from settling in your feet overnight.
Use Movement to Pump Fluid Upward
Your calf muscles act as a pump for your veins, squeezing blood and fluid back toward your heart with every contraction. When you sit or stand still for hours, that pump shuts off and fluid collects in your ankles. Walking is the simplest fix, but when you can’t get up, ankle pumps are surprisingly effective.
To do an ankle pump, point your toes down toward the floor, then pull them back up toward your shin. A systematic review of the research found that repeating this motion every three to four seconds is the most effective pace for improving blood flow in the lower legs. Try doing sets of 20 to 30 repetitions several times throughout the day, especially during long flights, car rides, or desk work. Even gentle circles with your ankles help activate the same muscle pump.
Try Compression Socks
Compression socks apply graduated pressure to your legs, tightest at the ankle and looser toward the knee, which helps push fluid upward. They come in different pressure levels measured in mmHg, and choosing the right one matters.
- 15 to 20 mmHg (mild): Good for occasional swelling from travel, long days on your feet, or very early fluid retention. Available over the counter at most pharmacies.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for people with recurring lower-leg swelling. Often needed when mild compression doesn’t hold swelling down throughout the day.
- 30 to 40 mmHg (firm): Used for more persistent or severe swelling, especially in the lower legs where gravity creates a heavier fluid load.
Fit matters more than pressure level. If the top band rolls down or digs into your skin, the size or style is wrong. Put compression socks on first thing in the morning before swelling builds, since they’re designed to prevent fluid accumulation rather than push out fluid that’s already there. If you’re unsure which level you need, start with 15 to 20 mmHg and move up if your swelling rebounds by the end of the day.
Cut Back on Sodium
Sodium causes your body to hold onto water, and excess salt is one of the most common contributors to puffy feet and ankles. The American Heart Association recommends less than 1,500 mg of sodium per day for the general population, though many guidelines use 2,000 mg as a practical upper limit for people prone to fluid retention.
For context, a single restaurant meal can easily contain 2,000 to 3,000 mg of sodium on its own. The biggest sources aren’t the salt shaker on your table. They’re processed foods, canned soups, deli meats, frozen meals, sauces, and bread. Reading nutrition labels and cooking more meals at home are the two changes that make the biggest dent. Most people notice less puffiness within a few days of lowering their sodium intake, since the body stops holding onto as much extra water.
Drinking enough water also helps. It sounds counterintuitive, but mild dehydration signals your body to retain more fluid. Staying well-hydrated keeps things moving through your kidneys more efficiently.
Other Home Strategies That Help
Soaking your feet in cool water can temporarily reduce swelling by constricting blood vessels near the skin’s surface. Epsom salt baths are popular, though the benefit likely comes more from the water temperature and the time spent off your feet than from magnesium absorption through the skin.
Limiting alcohol helps, since alcohol dilates blood vessels and promotes fluid retention. If your swelling tends to be worse in hot weather, staying cool and avoiding prolonged sun exposure on your legs can reduce the effect. Tight shoes and socks with elastic bands that dig in can also trap fluid below the constriction point, so switching to looser footwear during flare-ups makes a practical difference.
When Swelling Affects Only One Leg
Swelling in both feet and ankles is usually related to fluid retention, gravity, or a systemic issue. Swelling in just one leg is a different situation and can signal a blood clot in a deep vein, known as deep vein thrombosis (DVT). This is a medical emergency because the clot can break loose and travel to your lungs.
DVT symptoms include swelling in one leg along with pain or cramping (often starting in the calf), warmth in the affected area, and skin that looks red or purple. These symptoms can develop after long periods of immobility, surgery, injury, or during pregnancy. If you notice one-sided swelling with any of these signs, seek medical attention the same day.
Swelling During Pregnancy
Some swelling in the feet and ankles is completely normal during pregnancy, especially in the third trimester. The same strategies apply: elevate your legs frequently, wear compression socks, stay active with walking or ankle pumps, and keep sodium intake moderate.
What’s not normal is sudden swelling, particularly in your face and hands. This can be a sign of preeclampsia, a serious pregnancy complication involving high blood pressure. Other warning signs include severe headaches, changes in vision (blurriness or light sensitivity), pain in the upper belly under the right side of your ribs, shortness of breath, and nausea or vomiting. Any combination of sudden swelling with these symptoms warrants immediate medical attention.
How Doctors Assess and Treat Persistent Swelling
If home measures aren’t controlling your swelling, a provider will typically press a finger into the swollen area to check for “pitting edema,” where the skin holds an indentation after pressure is released. This is graded on a scale: mild cases leave a shallow dent that bounces back immediately, while severe cases leave an 8mm-deep impression that takes two to three minutes to rebound. The grade helps determine how aggressively swelling needs to be treated.
For swelling that doesn’t respond to lifestyle changes, prescription water pills (diuretics) help your kidneys flush out excess fluid through urine. These are commonly used when swelling is tied to heart, kidney, or liver conditions. Your provider will also look for underlying causes, since persistent edema can be a symptom of venous insufficiency (where leg veins don’t return blood efficiently), heart failure, kidney disease, or medication side effects from blood pressure drugs, steroids, or certain diabetes medications.
Chronic swelling that goes untreated can lead to skin changes, increased infection risk, and worsening discomfort over time. If your feet and ankles stay swollen despite consistent elevation, compression, exercise, and lower sodium intake, that’s worth investigating rather than just managing at home.