Swollen feet usually respond well to simple measures you can start right now: elevating your legs, moving more, cutting back on salt, and wearing compression socks. Most foot swelling comes from fluid leaking out of tiny blood vessels and pooling in surrounding tissue, a process driven by gravity, prolonged stillness, or an underlying health condition. The fix depends on the cause, but several strategies work across nearly all of them.
Why Feet Swell in the First Place
Swelling happens when small blood vessels called capillaries leak fluid into nearby tissue faster than your body can drain it. Gravity pulls that fluid downward, which is why feet and ankles bear the brunt. Sitting or standing in one position for hours, eating salty food, hormonal shifts before a menstrual period, and pregnancy all trigger mild versions of this.
More persistent swelling often points to an underlying condition. Heart failure causes blood to back up into the legs when the heart can’t pump efficiently. Kidney disease and liver cirrhosis both disrupt the body’s fluid balance. Chronic venous insufficiency, where damaged valves in leg veins let blood pool instead of returning to the heart, is one of the most common culprits. And if you’ve had lymph nodes removed or damaged (often from cancer treatment), your lymphatic drainage system may not clear fluid the way it should.
Certain medications cause swelling too. Blood pressure drugs in the calcium channel blocker class (like amlodipine) dilate blood vessels in a way that raises pressure inside capillaries, pushing fluid out. Some diabetes medications increase sodium retention and vascular permeability, producing the same result. If your feet started swelling after a new prescription, that connection is worth raising with your doctor.
Elevate Your Legs the Right Way
Elevation is the simplest and fastest relief. The key is getting your legs above the level of your heart, not just propped on an ottoman. Lie on a couch or bed and stack pillows under your calves and feet until they’re higher than your chest. Hold that position for about 15 minutes, and aim to do it three to four times a day. Even one session can noticeably reduce puffiness, but consistency over days makes a bigger difference for chronic swelling.
Get Your Feet and Ankles Moving
Your calf muscles act as a pump that pushes blood back up toward your heart. When you sit still for hours, that pump shuts off and fluid accumulates. Walking is the most effective way to restart it, but even small movements help when walking isn’t an option.
Ankle pumps are a go-to exercise. Sit or lie with your legs extended, then point your toes toward your knees as far as you can, hold briefly, and point them away from you. Alternate back and forth for two to three minutes, and repeat that cycle two to three times per hour. It sounds minor, but it meaningfully improves the rate at which blood returns from your lower legs. Stop if it causes pain.
If you work at a desk, set a reminder to stand and walk for a few minutes every 30 to 60 minutes. On long flights or car rides, try to move your muscles every 15 to 20 minutes, even if it’s just marching in place or doing ankle rotations in your seat.
Try Compression Socks
Compression socks apply graduated pressure to your lower legs, tightest at the ankle and looser toward the knee, which helps push fluid upward and prevents it from pooling. They come in different pressure levels measured in mmHg, and matching the right level to your situation matters.
- 15 to 20 mmHg (mild): Good for daily prevention, mild ankle swelling, travel, or long days on your feet. Available over the counter without a prescription.
- 20 to 30 mmHg (moderate): Appropriate for varicose veins, moderate swelling, post-surgical recovery, or blood clot prevention. A doctor’s guidance is recommended.
- 30 to 40 mmHg (firm): Used for lymphedema, chronic venous insufficiency, and severe varicose veins. Requires a prescription.
For most people dealing with everyday swollen feet, the 15 to 20 mmHg range is a reasonable starting point. Put them on first thing in the morning before swelling builds up during the day. The 2025 clinical guidelines from the Society for Cardiovascular Angiography and Interventions recommend compression therapy for anyone with symptomatic varicose veins or chronic venous insufficiency, noting that stronger compression tends to be more effective.
Cut Back on Sodium
Salt makes your body hold onto water, and that extra fluid has to go somewhere. Reducing sodium intake is one of the most effective dietary changes for managing swelling. The American Heart Association recommends staying under 1,500 mg of sodium per day for the general population. For people with heart failure, guidelines suggest capping intake at 2,000 mg daily.
To put that in perspective, a single restaurant meal or a few servings of processed food can easily hit 2,000 mg on its own. The biggest sources aren’t the salt shaker on your table but packaged foods, deli meats, canned soups, sauces, and fast food. Reading nutrition labels and cooking more meals at home are the most practical ways to bring your intake down. You won’t see results overnight, but within a few days of consistent sodium reduction, your body releases stored water and swelling decreases.
Stay Hydrated and Keep Moving
It sounds counterintuitive, but drinking enough water actually helps reduce swelling. When you’re dehydrated, your body holds onto more fluid as a protective response. Staying well hydrated signals your kidneys to release excess water and sodium normally.
Regular physical activity, even moderate walking for 20 to 30 minutes a day, improves circulation and strengthens the calf muscle pump that drives blood back from your legs. Swimming and water aerobics are especially helpful because the water pressure itself provides gentle compression on your lower body while you exercise.
Swelling During Pregnancy
Some foot and ankle swelling is normal during pregnancy, particularly in the third trimester, as blood volume increases and the growing uterus puts pressure on pelvic veins. Elevation, compression socks, and reducing sodium all help.
What isn’t normal is sudden, severe swelling, especially in the hands and face. Combined with a severe headache that won’t go away, blurry vision, dark spots in your vision, sharp pain in the upper right abdomen, or shortness of breath, these can be signs of preeclampsia, a serious pregnancy complication that requires immediate medical attention. If you experience any of those symptoms, go to the nearest hospital.
When Swelling Is a Warning Sign
Most foot swelling is harmless, but certain patterns deserve prompt attention. Sudden swelling in just one leg, especially with pain or tenderness in the calf, can signal a deep vein thrombosis (a blood clot in a leg vein). This is a medical emergency because the clot can travel to the lungs.
Swelling in one leg also accounts for a range of less urgent problems. About 40% of cases turn out to be a muscle strain or tear, and a small percentage involve a cyst behind the knee or a skin infection called cellulitis (look for warmth, redness, and fever along with the swelling).
Swelling that develops in both legs and doesn’t improve with elevation and lifestyle changes may point to heart, kidney, or liver problems. If you press a finger into the swollen area and the dent stays for several seconds after you release, that’s called pitting edema, and it’s worth mentioning to your doctor. The same goes for swelling that gets progressively worse over weeks, swelling accompanied by shortness of breath, or skin that becomes tight, shiny, or discolored over the swollen area.