Swollen feet usually improve with a few simple steps: elevating your legs, moving around, and cutting back on salt. In most cases, the swelling is caused by fluid pooling in your lower extremities after long periods of sitting or standing, eating a high-sodium meal, or as a side effect of medication. But certain warning signs alongside swelling need immediate medical attention, so it’s worth knowing what’s routine and what isn’t.
Elevate Your Feet (But You Don’t Need to Go High)
Propping your feet up is the fastest way to get fluid moving back toward your core. The good news: you don’t need to raise them dramatically. Research comparing high elevation (about 12 inches) to low elevation (about 4 inches, using a regular pillow) found no significant difference in swelling reduction. Low elevation with a pillow was just as effective and far more comfortable. Lie back on a couch or bed and rest your feet on a cushion or two so they’re slightly above heart level.
One important caveat: the effect doesn’t last long once you put your feet back down. Studies show the swelling-reduction benefit disappears within about five minutes of returning your legs to a gravity-dependent position. That means elevation works best as something you repeat throughout the day, not a one-time fix. Aim for at least 20 minutes per session, which is the minimum duration shown to produce measurable volume changes.
Get Your Calves Working
Your calf muscles act as a pump for your veins, squeezing blood and fluid upward each time they contract. When you sit or stand still for hours, that pump shuts off and fluid accumulates in your feet and ankles. Simple ankle exercises can restart it without requiring you to go for a full walk.
Try ankle pumps: point your toes down, hold for five seconds, then pull them up toward your shin and hold for five seconds. Repeat this for about five minutes, then do gentle ankle circles for another five minutes. Doing this routine three times a day can noticeably reduce swelling. Even just getting up and walking around for a few minutes every hour helps keep fluid from settling.
Cut Back on Sodium
Sodium pulls water into the spaces outside your cells. When you eat a salty meal, your body holds onto extra fluid to keep the sodium-to-water ratio in balance. That extra fluid tends to settle in the lowest parts of your body: your feet and ankles.
A reasonable target for reducing fluid retention is keeping sodium under 2,000 to 3,000 mg per day. For context, a single fast-food meal can easily contain 1,500 mg or more. Reading labels, cooking at home, and choosing fresh foods over processed ones are the most practical ways to stay in range. If your swelling tends to flare after restaurant meals or packaged snacks, sodium is a likely culprit.
Why Drinking More Water Helps, Not Hurts
It sounds counterintuitive, but drinking water can actually reduce swelling. Your body constantly monitors the concentration of sodium in your blood. When sodium levels are high relative to water, your kidneys hold onto fluid to dilute it. When you drink enough water, the balance shifts: your brain reduces the release of the hormone that tells kidneys to retain water, and you start producing more dilute urine. The result is less fluid retention overall.
This doesn’t mean you should flood yourself with water. Just make sure you’re drinking consistently throughout the day, especially if your diet has been saltier than usual.
Try Compression Stockings
Compression stockings apply gentle, graduated pressure that helps push fluid out of your lower legs. You don’t need heavy-duty medical-grade stockings for everyday swelling. Research shows that light compression in the 10 to 15 mmHg range is effective at preventing and reducing fluid buildup from prolonged sitting or standing. Higher pressures (15 to 20 mmHg or 20 to 30 mmHg) are available over the counter and may help if light compression isn’t enough, though studies suggest the additional benefit of going higher is modest for most people.
Knee-high stockings are sufficient for foot and ankle swelling. Put them on in the morning before swelling sets in for the day. If you have trouble getting them on, try applying them while your legs are still elevated from sleep.
Check Your Medications
Foot swelling is a known side effect of several common drug classes. Blood pressure medications called calcium channel blockers are among the most frequent offenders. Nerve pain medications like gabapentin and pregabalin can cause similar swelling by affecting the same calcium channels in blood vessels. Other medications linked to fluid retention include:
- NSAIDs (ibuprofen, naproxen, celecoxib), which cause the kidneys to retain sodium and water
- Steroids, particularly those with effects on the kidneys’ handling of sodium
- Diabetes medications in the thiazolidinedione class
- Dopamine-related medications used for conditions like Parkinson’s disease
- Certain antipsychotics that reduce the nervous system’s ability to push blood forward through veins
- Nitrates, which relax veins and allow blood to pool
- Insulin, which can cause a condition called insulin edema syndrome when therapy is first started or increased
If your swelling started or worsened after beginning a new medication, that connection is worth raising with your prescriber. Don’t stop any medication on your own, but knowing the link can help guide a conversation about alternatives.
Understanding What You’re Seeing
You can gauge the severity of your swelling with a simple test: press a finger firmly into the top of your foot or the inside of your ankle for a few seconds, then release. If the skin bounces right back, the swelling may be from inflammation rather than fluid. If your finger leaves a visible dent that takes time to fill back in, that’s called pitting edema, and the depth of the dent tells you how significant it is.
A dent less than 4 mm deep is mild (grade 1). Between 4 and 6 mm is moderate (grade 2). Six to 8 mm is grade 3, and anything 8 mm or deeper is grade 4. Mild pitting edema after a long day on your feet or a salty meal is common and usually resolves with the strategies above. Deeper, persistent pitting, especially if it doesn’t improve overnight, may point to an underlying issue like heart, kidney, or liver problems that needs evaluation.
Warning Signs That Need Urgent Attention
Most foot swelling is harmless, but certain combinations of symptoms signal something serious. If only one leg is swollen and you notice warmth, skin color changes (reddish or purplish), and pain or cramping that started in the calf, those are classic signs of a deep vein thrombosis, a blood clot in a leg vein. This can occur without all of those symptoms, so even unexplained swelling in just one leg warrants prompt medical evaluation.
Seek emergency care if swelling in your legs is accompanied by chest pain, difficulty breathing, shortness of breath when lying flat, dizziness or fainting, or coughing up blood. These can indicate a blood clot that has traveled to the lungs or a serious heart condition. Neither situation can wait for a routine appointment.