Elevating your feet above heart level for 15 minutes, three to four times a day, is one of the simplest and most effective ways to reduce swollen feet. But depending on what’s causing the swelling, you may also benefit from compression, movement, dietary changes, or medical treatment. Swollen feet happen when excess fluid gets trapped in the tissue, and the fix depends on why that fluid is building up in the first place.
Why Feet Swell
Swelling in the feet and ankles occurs when fluid leaks out of tiny blood vessels and collects in the surrounding tissue. This can happen for several reasons: pressure inside your veins gets too high (from standing all day, pregnancy, or heart problems), your blood vessels become more “leaky” due to inflammation or injury, your body holds onto too much salt and water, or your lymphatic system can’t drain fluid efficiently. Understanding which of these is driving your swelling helps you pick the right remedy.
Most of the time, swollen feet come from something straightforward: long hours on your feet, a hot day, too much salt at dinner, or sitting through a long flight. These causes respond well to home strategies. Persistent or severe swelling, especially if it’s only in one leg, can signal something more serious that needs medical attention.
Elevation
Gravity is working against you all day long, pushing fluid down into your feet. Elevating your legs reverses that equation. Position your legs so they’re above the level of your heart, using pillows on a couch or bed. Hold that position for about 15 minutes, and repeat three to four times throughout the day. Even a single session can noticeably reduce puffiness, and consistency over several days makes a bigger difference.
If you work at a desk, propping your feet on a footrest or low stool helps, though it’s not as effective as getting them above your heart. The key is creating opportunities throughout the day rather than waiting until bedtime.
Compression Stockings
Compression stockings apply gentle, graduated pressure to your legs, squeezing fluid back up toward your heart and preventing it from pooling in your feet. They come in different pressure levels measured in mmHg:
- 15 to 20 mmHg (mild): Good for minor swelling, long flights, or tired legs after a day on your feet.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for everyday management of mild to moderate swelling.
- 30 to 40 mmHg (firm): Used for more significant swelling or chronic venous problems, often paired with custom-fit garments.
Start with mild compression if you’ve never worn them before. Put them on first thing in the morning before swelling has a chance to build up. They should feel snug but not painful. If over-the-counter options don’t help, a doctor can prescribe a specific pressure level and fit.
Movement and Calf Exercises
Your calf muscles act as a pump for your veins. Every time they contract, they squeeze blood and fluid upward out of your lower legs. When you sit or stand still for hours, that pump barely works, and fluid accumulates. Simple exercises can restart it.
Ankle pumps are the easiest: pull your toes up toward your shin, then point them toward the floor. Repeat 5 to 10 times. You can do this sitting at your desk, on a plane, or lying in bed. Heel raises are another good option. While sitting with your feet flat on the floor, lift your heels while keeping your toes down. If you’re stuck standing for a long stretch, hold onto a counter or chair back and rise up onto the balls of your feet, then slowly lower back down. Five to ten repetitions every hour or so can meaningfully reduce fluid buildup.
Walking is even better, since it engages the full calf pump with every step. Even a short five-minute walk breaks up long periods of sitting or standing and helps push fluid out of your feet.
Reducing Salt Intake
Sodium makes your body hold onto water. When you eat a salty meal, your kidneys retain extra fluid to keep your blood chemistry balanced, and some of that fluid ends up in your feet. For people dealing with persistent swelling, keeping daily sodium intake between 1,375 and 1,800 milligrams can make a real difference. For context, the average American eats well over 3,000 milligrams a day, and a single fast-food meal can exceed 2,000.
Most excess sodium comes from processed and restaurant foods, not from the salt shaker. Canned soups, deli meats, frozen meals, bread, and condiments are common culprits. Reading nutrition labels and cooking more meals at home gives you the most control.
Potassium works as a natural counterbalance to sodium, helping your kidneys release excess fluid. Loading up on potassium-rich foods like bananas, oranges, melons, potatoes, sweet potatoes, and cooked spinach supports that process. These aren’t magic cures, but pairing lower sodium with higher potassium is one of the more effective dietary strategies for reducing fluid retention.
Lymphatic Drainage
Your lymphatic system is a network of vessels that collects excess fluid from your tissues and routes it back into your bloodstream. When it’s sluggish or damaged, fluid accumulates and causes swelling that doesn’t respond as well to elevation alone.
Manual lymphatic drainage is a specialized, very light-touch technique performed by trained physical therapists. It redirects excess fluid from swollen areas into parts of the body where the lymphatic system can filter and remove it. This isn’t the same as a regular massage. Therapists at major cancer centers like MD Anderson use up to 18 distinct steps tailored to each patient. The techniques and exercises are highly individualized, so if you suspect lymphatic issues are behind your swelling, working with a certified lymphedema therapist is the most effective route.
Prescription Diuretics
When home remedies aren’t enough, doctors sometimes prescribe diuretics, commonly called “water pills.” These medications help your kidneys flush out excess sodium and water, reducing the total fluid volume in your body. They’re typically reserved for swelling caused by an underlying condition like heart failure, liver disease, or kidney problems, not for occasional puffy feet after a long day.
Diuretics work well but require monitoring, since they affect your electrolyte balance and can cause dehydration or low potassium if not managed properly. They treat the symptom (fluid overload) while your doctor addresses the root cause.
When Swelling Is a Warning Sign
Swelling in both feet that comes and goes with activity, heat, or salty meals is usually benign. But certain patterns deserve prompt medical attention.
Swelling in only one leg, especially if it comes with pain, warmth, or redness, can indicate a blood clot. About 75% of blood clots in the legs affect just one side, with the left leg involved more often. This is a medical emergency if accompanied by sudden shortness of breath or chest pain.
Bilateral swelling that doesn’t improve with elevation and persists for weeks can point to heart failure, kidney disease, liver problems, severe hypothyroidism, or chronic venous insufficiency. Each of these conditions causes fluid buildup through a different mechanism, and the swelling pattern often comes with other clues: shortness of breath with heart failure, weight gain and constipation with thyroid problems, or skin changes and varicose veins with venous insufficiency.
During pregnancy, mild foot swelling is normal. But sudden swelling, particularly in the face and hands, along with severe headaches, vision changes, or upper belly pain, can signal preeclampsia. This requires immediate medical evaluation.