Swollen feet happen when fluid leaks from tiny blood vessels and pools in the surrounding tissue, usually pulled downward by gravity. The good news: most everyday foot swelling responds well to a handful of simple strategies you can start today. The key is addressing what’s driving the fluid buildup, whether that’s prolonged sitting, excess salt, a medication side effect, or an underlying health condition.
Elevate Your Legs Above Your Heart
Elevation is the fastest way to move trapped fluid out of your feet. Lie down and prop your legs on a pillow so they’re above the level of your heart. Hold this position for about 15 minutes, and aim to do it three to four times a day. If lying flat isn’t practical, resting your feet on an ottoman or coffee table still helps by slowing the gravitational pull that keeps fluid pooling in your lower legs.
Consistency matters more than perfection here. A single session provides temporary relief, but repeating it throughout the day keeps swelling from rebuilding. Many people find that elevating first thing in the morning and again after work makes the biggest difference.
Move Your Ankles and Calves Regularly
Your calf muscles act as a pump that pushes blood and fluid back up toward your heart. When you sit or stand still for hours, that pump essentially shuts off, and fluid accumulates in your feet. Even small, seated movements can restart it.
Ankle pumps are one of the simplest exercises. While sitting or lying down, point your toes toward your knees, then away from you, alternating back and forth for two to three minutes. Repeat this two to three times every hour, especially during long flights, desk work, or car rides. Walking for even five to ten minutes per hour has a similar effect because each step contracts the calf and squeezes fluid upward through your veins.
Cut Back on Sodium
Salt causes your body to hold onto water, and that extra fluid often shows up in your feet first. Most health organizations recommend staying under 2,000 mg of sodium per day if you’re dealing with fluid retention. For context, a single fast-food meal can easily contain 1,500 mg or more.
The biggest sodium sources are usually processed and packaged foods: canned soups, deli meats, frozen meals, soy sauce, and restaurant dishes. Cooking at home with fresh ingredients gives you far more control. Read nutrition labels and watch for items where sodium exceeds 20% of the daily value per serving. Reducing sodium doesn’t produce results overnight, but within a few days you’ll typically notice less puffiness in your feet and ankles.
Drink More Water, Not Less
It sounds counterintuitive, but drinking plenty of water actually helps reduce swelling. When you’re dehydrated, your body holds onto every bit of fluid it can, making retention worse. Staying well-hydrated signals your kidneys to release excess sodium and water rather than hoarding it. There’s no magic number that works for everyone, but aiming for pale yellow urine is a reliable indicator you’re drinking enough.
Try Compression Socks
Compression socks apply gentle, graduated pressure that helps push fluid out of your feet and back into circulation. They come in different pressure levels measured in mmHg:
- 15 to 20 mmHg (mild): Good for very early or mild swelling, long flights, and days spent mostly on your feet. These are available over the counter without a prescription.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for mild to moderate swelling, post-surgical recovery, and ongoing management of lower-leg fluid retention.
Put compression socks on first thing in the morning before swelling has a chance to develop. If you wait until your feet are already puffy, they’ll be harder to pull on and less effective. Start with the mild level and move up only if needed.
Check Your Medications
Several common medications cause foot swelling as a side effect. Calcium channel blockers used for blood pressure are among the worst offenders. Amlodipine, for example, causes noticeable ankle swelling in nearly half of the people who take it. Other culprits include:
- Other blood pressure drugs: beta blockers, hydralazine, and clonidine
- Hormone treatments: estrogen, progesterone, testosterone, and corticosteroids
- Nerve pain and seizure medications: gabapentin and pregabalin
- NSAIDs: ibuprofen, naproxen, and similar anti-inflammatory painkillers
- Certain antidepressants and diabetes medications
If your swelling started or worsened after beginning a new medication, that’s worth bringing up with your prescriber. Don’t stop a medication on your own, but there may be alternative options that don’t cause the same fluid retention.
Consider Magnesium for Hormonal Swelling
If your feet tend to swell in the days before your period, magnesium may help. Research has found that 200 mg of magnesium daily, combined with 50 mg of vitamin B6, can reduce premenstrual bloating and fluid retention. Magnesium is also found in foods like spinach, pumpkin seeds, dark chocolate, and almonds, so increasing those in your diet is another option.
Choose the Right Footwear
Tight shoes make swelling worse by restricting circulation and trapping fluid. If your feet swell regularly, look for shoes with adjustable closures (velcro straps or laces you can loosen throughout the day), a wide toe box, and soft, stretchy materials that give as your feet expand. Open-toe designs can also relieve pressure. Avoid socks with tight elastic bands at the top. Non-binding socks made from stretch fabric accommodate swelling without cutting into your skin.
When Swelling Signals Something Serious
Most foot swelling is harmless and tied to lifestyle factors like sitting too long, eating salty food, or warm weather. But certain patterns deserve prompt medical attention.
Swelling in only one leg, especially when paired with calf pain, warmth, or skin that looks red or purple, can signal a deep vein thrombosis (blood clot). DVT can sometimes occur without obvious symptoms, which makes sudden one-sided swelling important to take seriously. If a clot breaks free and travels to the lungs, it causes a pulmonary embolism, with warning signs that include sudden shortness of breath, chest pain that worsens when you breathe deeply, a rapid pulse, dizziness, or coughing up blood. That’s a medical emergency.
Persistent swelling in both legs that doesn’t improve with elevation and lifestyle changes can point to heart failure, kidney disease, liver problems, or issues with your veins not moving blood back efficiently (venous insufficiency). Swelling that leaves a visible dent when you press on it, spreads up toward your knees, or comes with unexplained weight gain over a short period warrants a medical evaluation to rule out these conditions.