Swollen feet usually respond well to a combination of elevation, movement, compression, and dietary changes. Most cases stem from fluid pooling in the lower legs due to gravity, prolonged sitting or standing, high sodium intake, or medication side effects. The strategies below work for everyday, non-emergency swelling. If your feet swelled suddenly in one leg, or you’re also short of breath, those are different situations covered at the end.
Elevate Your Feet Above Heart Level
The simplest and fastest way to move fluid out of swollen feet is gravity. Lie down and prop your feet on pillows so they sit above the level of your heart. This repositions the fluid column in your veins and lets blood flow back toward your core without fighting gravity. Aim for 20 to 30 minutes at a time, several times a day if swelling is persistent. Even raising the foot of your bed a few inches at night can reduce the fluid that accumulates while you sleep.
Use Ankle Pumps and Gentle Movement
Your calf muscles act as a pump for the veins in your lower legs. Every time you flex and point your foot, those muscles squeeze blood upward through one-way valves in your veins. When you sit or stand still for hours, that pump goes dormant and fluid collects around your ankles.
Ankle pumping exercises are simple: point your toes down for one second, then pull them up toward your shin for one second, and repeat. Research published in the Journal of Physical Therapy Science tested different rest intervals between pumps and found that adding a four-second pause between repetitions tended to produce the greatest increase in blood flow velocity through the leg veins. So a steady, unhurried rhythm works better than rapid-fire pumping. Do these for a few minutes every hour when you’re seated for long stretches, such as at a desk or on a flight.
Walking is the most natural activator of the calf pump. Even a five-minute walk around the office or house helps. Swimming and cycling are also effective because they combine leg movement with gentle compression from water or consistent pedaling.
Try Compression Socks or Stockings
Compression stockings apply graduated pressure to your lower legs, tightest at the ankle and looser toward the knee or thigh. This external squeeze helps veins push blood upward and prevents fluid from leaking into surrounding tissue. They come in three broad pressure classes: low compression (under 20 mmHg), medium compression (20 to 30 mmHg), and high compression (above 30 mmHg).
For mild, everyday swelling from standing or sitting, low-compression socks available at most pharmacies are a good starting point. If you have moderate edema or varicose veins, medium compression is typically more effective. Higher-pressure garments (up to 60 mmHg) are reserved for conditions like lymphedema and usually require a fitting from a healthcare provider. The general principle is to wear the highest level of compression you can tolerate comfortably, and to put the stockings on first thing in the morning before swelling builds up during the day.
Cut Back on Sodium
Sodium causes your body to hold onto water. The more salt you eat, the more fluid your kidneys retain to keep your blood chemistry in balance, and that extra fluid often settles in your feet and ankles. The American Heart Association recommends keeping sodium below 2,300 mg per day, which is roughly one teaspoon of table salt.
Most excess sodium comes not from the salt shaker but from processed and restaurant foods: deli meats, canned soups, frozen meals, bread, cheese, and condiments like soy sauce. Reading nutrition labels and choosing lower-sodium versions of staples you eat frequently can make a measurable difference within days. Cooking at home with fresh ingredients gives you the most control.
Stay Hydrated and Consider Magnesium
It sounds counterintuitive, but drinking enough water actually reduces swelling. When you’re dehydrated, your body compensates by holding onto more fluid. Consistent water intake signals your kidneys that it’s safe to release excess fluid rather than store it.
Magnesium plays a role in fluid balance, and low levels are associated with increased water retention. A randomized, double-blind study found that 200 mg of supplemental magnesium per day reduced symptoms of fluid retention after two menstrual cycles. Foods rich in magnesium include dark leafy greens, nuts, seeds, and whole grains. If your diet is low in these, a supplement in the 200 to 400 mg range is a reasonable option, though it may take several weeks to notice a difference.
Soak in Epsom Salt Water
Epsom salt soaks are a popular home remedy, and there is some clinical evidence behind them. A study on pregnant women with foot edema compared Epsom salt soaks to foot exercises over three days. Women who soaked their feet in warm water with 30 grams (about two tablespoons) of Epsom salt for 20 minutes daily saw a 74% reduction in foot swelling, compared to 55% in the exercise group. The warm water itself promotes blood flow, and the magnesium sulfate in Epsom salt may contribute an additional effect. Whether the benefit comes primarily from the warmth, the osmotic properties of the salt, or actual magnesium absorption through the skin remains debated, but the practical result was meaningful.
Check Your Medications
Several common medications cause foot and ankle swelling as a side effect. The most well-known culprits are calcium channel blockers, a class of blood pressure drugs that includes amlodipine, nifedipine, and diltiazem. Between 1% and 15% of people on standard doses develop ankle swelling, and at higher doses the rate can exceed 80%. The swelling happens because these drugs relax blood vessel walls, allowing more fluid to leak into surrounding tissue.
If you suspect a medication is causing your swelling, don’t stop it on your own. Combining a calcium channel blocker with another type of blood pressure medication can reduce swelling by about 38% compared to taking the calcium channel blocker alone, so your doctor has options for adjusting your regimen. Other medications that commonly cause fluid retention include certain diabetes drugs, steroids, hormonal therapies, and some anti-inflammatory painkillers.
Swelling That Needs Medical Attention
Not all foot swelling is harmless. The most important distinction is whether the swelling affects one leg or both. As a general rule, swelling in a single leg suggests a localized problem like a blood clot (deep vein thrombosis) or infection, especially if it came on within the past 72 hours. A leg that’s suddenly swollen, warm, red, or painful needs prompt evaluation.
Swelling in both legs and feet is more commonly tied to systemic issues: heart, kidney, liver, or thyroid problems. Pay attention to accompanying symptoms. Shortness of breath during activity, waking up at night gasping for air, or needing extra pillows to breathe comfortably while sleeping are warning signs of heart failure. Rapid-onset swelling in both legs (under 72 hours) also warrants urgent assessment.
You can do a rough self-check by pressing a finger firmly into the swollen area for a few seconds. If it leaves a dent that bounces back immediately with only a shallow pit (about 2 mm), that’s mild, grade 1 pitting edema. If the dent is deeper (5 mm or more) and takes 15 seconds to a minute to fill back in, that’s grade 3 and worth bringing up with a doctor. Grade 4 edema leaves an 8 mm pit that takes two to three minutes to rebound and signals significant fluid overload. Swelling that doesn’t pit at all, feels doughy or firm, and develops thickened skin over time points toward lymphedema, which requires a different treatment approach than standard fluid retention.