Swollen ankles and feet usually improve with a few straightforward strategies: elevating your legs, moving more, cutting back on salt, and wearing compression socks. Most cases stem from fluid pooling in the lower legs after long periods of sitting or standing, and the fix is helping that fluid move back toward your heart. But swelling can also signal something more serious, so knowing which patterns matter is just as important as knowing how to get relief.
Elevate Your Legs the Right Way
Elevation is the fastest way to reduce swelling you can feel building up during the day. The goal is simple: get your feet above the level of your heart so gravity helps drain fluid back into circulation. Lying on a bed or couch with a pillow under your ankles works well. You don’t need to prop your legs dramatically high. Research on post-surgical ankle swelling found that low elevation with a standard pillow (about 10 cm, or 4 inches) reduced swelling just as effectively as higher elevation, and was significantly more comfortable.
Aim for 20 to 30 minutes per session, and repeat several times a day if your swelling tends to worsen by evening. If you work at a desk, even a short midday session can make a noticeable difference.
Keep Your Ankles Moving
Your calf muscles act as a pump for the veins in your lower legs. Every time they contract, they squeeze blood upward toward your heart. When you sit or stand still for hours, that pump barely works, and fluid accumulates.
Ankle pumps are the simplest exercise to get things moving. Sit or lie with your legs extended, then alternate between pointing your toes toward your knees and pointing them away from you, going as far as you comfortably can in each direction. Do this for two to three minutes, and repeat two to three times per hour when you’re sedentary. Walking, even short laps around a room, activates the same calf pump mechanism more forcefully. If your job keeps you seated, set a reminder to stand and walk for a few minutes every hour.
Try Compression Socks
Compression stockings apply graduated pressure to your lower legs, tightest at the ankle and looser as they go up. This helps prevent fluid from settling into the tissues around your feet. For mild, everyday swelling, socks rated at 15 to 20 mmHg (labeled “mild support”) are a good starting point and are available without a prescription. They’re also commonly used during air travel or long drives.
If mild compression doesn’t do enough, 20 to 30 mmHg stockings are the most commonly prescribed level for moderate lower-leg swelling. Socks rated 30 to 40 mmHg and above are reserved for more significant or persistent swelling and should be fitted with guidance from a healthcare provider, since too much pressure on the wrong legs can cause problems. Put compression socks on first thing in the morning, before swelling has a chance to build up.
Reduce Your Sodium Intake
Salt makes your body hold onto water, and that extra fluid often shows up first in the ankles and feet. Multiple cardiology and dietetic guidelines converge on the same target: keeping sodium under 2,000 mg per day if you’re prone to fluid retention. That’s less than a single teaspoon of table salt. The average American diet contains well over 3,000 mg daily, most of it from processed foods, restaurant meals, canned soups, deli meats, and condiments.
Reading nutrition labels is the most practical step. Swap high-sodium staples for lower-sodium versions, season food with herbs and spices instead of salt, and cook more meals at home where you control what goes in. Drinking plenty of water also helps your kidneys flush excess sodium rather than holding onto it.
Check Your Medications
Several common medications cause ankle and foot swelling as a side effect. Blood pressure drugs in the calcium channel blocker family are among the most frequent culprits. Other known offenders include NSAIDs (like ibuprofen and naproxen), steroids, certain diabetes medications, drugs used for nerve pain, some antipsychotics, and even insulin. ACE inhibitors, another class of blood pressure medication, can occasionally cause a different type of swelling called angioedema.
If your swelling started or worsened after beginning a new medication, that connection is worth raising with your prescriber. Don’t stop a medication on your own, but ask whether an alternative exists that’s less likely to cause fluid retention.
One Leg or Both Legs Matters
The pattern of your swelling tells a lot about what’s causing it, and this distinction is one of the most useful things you can notice before seeking care.
Swelling in One Leg
When only one ankle or foot swells, the cause is typically local rather than systemic. The most important thing to rule out is a deep vein thrombosis (DVT), a blood clot in the leg. This is especially relevant if the swelling came on quickly and is accompanied by pain, warmth, or redness. Among people evaluated for sudden one-sided leg swelling who don’t have a clot, about 40% turn out to have a muscle strain or minor injury, while smaller percentages have an infection, a cyst behind the knee, or vein problems.
Chronic one-sided swelling most commonly comes from venous insufficiency, where the valves in leg veins don’t close properly and blood pools in the lower leg. You might notice skin discoloration or a heavy, aching feeling that worsens through the day. Lymphedema, a buildup of lymph fluid, is another possibility, particularly after surgery or radiation in the pelvic area.
Swelling in Both Legs
Symmetrical swelling is more often related to a whole-body issue. The most common cause is still chronic venous disease, but bilateral swelling also raises the question of heart, kidney, or liver problems. Heart failure causes fluid to back up in the legs when the heart can’t pump efficiently. Kidney disease impairs the body’s ability to remove excess fluid. Liver disease can reduce protein levels in the blood, letting fluid leak into tissues. Less common causes include hormonal shifts (such as premenstrual fluid retention), certain medications, and prolonged malnutrition.
Warning Signs That Need Prompt Attention
Most ankle swelling is uncomfortable but not dangerous. Certain combinations of symptoms, however, suggest the swelling is part of something more urgent. Be alert if your swollen ankles come with shortness of breath, especially if you can’t lie flat without feeling winded. A rapid or irregular heartbeat alongside leg swelling can point to a heart rhythm problem or worsening heart failure. Swelling that spreads to your abdomen or other parts of your body suggests a systemic issue rather than simple fluid pooling.
For one-sided swelling, sudden onset with calf pain, redness, and warmth warrants same-day evaluation to rule out a blood clot. Swelling with fever and spreading redness could indicate an infection that needs treatment quickly.
How to Tell if Swelling Is Significant
A quick self-check: press a fingertip firmly into the swollen area for a few seconds, then release. If the pressure leaves an indent that takes time to fill back in, that’s called pitting edema, and the depth and rebound time indicate severity. A shallow 2 mm dent that bounces back immediately is Grade 1, the mildest form. A deeper pit of 3 to 4 mm that refills within 15 seconds is Grade 2. Grade 3 leaves a 5 to 6 mm pit that takes up to a minute to rebound, and Grade 4 leaves an 8 mm indent that can take two to three minutes to fill back in.
Grade 1 swelling that responds to elevation, movement, and salt reduction is usually manageable on your own. If you’re consistently at Grade 3 or 4, or if the swelling doesn’t improve with basic measures over a few days, that’s a signal to get evaluated for an underlying cause rather than just managing the symptom.