Elevating your legs, wearing compression stockings, staying active, and cutting back on salt are the most effective ways to reduce swelling in your legs and ankles. Most mild swelling responds well to these strategies within hours to days, but persistent or worsening swelling can signal an underlying condition that needs attention.
Why Legs and Ankles Swell
Swelling in the lower legs happens when excess fluid builds up in the tissue outside your blood vessels. Gravity pulls blood and fluid downward throughout the day, and your body relies on a few systems to push it back up: one-way valves in your veins, the squeezing action of your calf muscles when you walk, and a network of lymphatic vessels that drain fluid from your tissues. When any of these systems falls behind, fluid pools in your feet, ankles, and lower legs.
The most common triggers are prolonged sitting or standing, too much salt in your diet, hot weather, pregnancy, and certain medications (especially blood pressure drugs, anti-inflammatory painkillers, and some diabetes medications). Heart failure, kidney disease, liver disease, and venous insufficiency can also drive chronic swelling. Figuring out why you’re swelling matters because the right fix depends on the cause.
Elevate Your Legs Above Your Heart
Elevation is the simplest, fastest way to move fluid out of swollen legs. The key detail most people miss: your legs need to be higher than your heart for gravity to work in your favor. Propping your feet on an ottoman while sitting in a recliner helps a little, but lying down with your legs raised on a stack of pillows or a cushion elevator is significantly more effective. Research comparing different elevation heights found that raising the legs about 30 centimeters (roughly 12 inches) above the mattress produced meaningful reductions in swelling, while a lower 10-centimeter elevation was less effective.
Aim for 15 to 20 minutes per session, several times a day. Even a single 20-minute session in an elevated position has been shown to reduce leg volume compared to sitting upright. If your swelling is worse in the evening, elevating before bed and sleeping with a pillow under your calves can help you wake up with less puffiness.
Use Compression Stockings
Compression stockings apply graduated pressure to your legs, tightest at the ankle and loosening as they move up. This squeezes fluid back toward your heart and prevents it from pooling. They come in several pressure levels, measured in millimeters of mercury (mmHg), and the right level depends on how much swelling you have.
- 15 to 20 mmHg (mild): Good for occasional swelling, long flights, or jobs that keep you on your feet. Available over the counter without a prescription.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for day-to-day management of mild to moderate swelling, post-injury recovery, and maintenance after treatment for lymphedema.
- 30 to 40 mmHg (firm): Used for more stubborn lower-leg swelling, chronic venous problems, or cases where moderate compression isn’t enough. These typically require a fitting or prescription.
- 40 to 50 mmHg and above: Reserved for severe swelling with significant tissue changes, and only after clinical assessment.
Put compression stockings on first thing in the morning, before swelling builds up during the day. If you’ve never worn them, start with a lower pressure level and work your way up. They should feel snug but not painful. People with peripheral artery disease or reduced blood flow to the legs should get clearance before using compression, since the external pressure can worsen circulation in already-narrowed arteries.
Move Your Calf Muscles
Your calf muscles act as a pump for your veins. Every time they contract, they squeeze blood upward against gravity. When you sit or stand still for long stretches, that pump goes idle and fluid accumulates. Walking is the easiest way to activate it, but even small movements help when you’re stuck at a desk or on a plane.
Ankle pumps are a simple exercise you can do anywhere: point your toes down toward the floor, then pull them up toward your shin. Repeat this motion for five to ten minutes. Research on patients with significant fluid retention found that doing ankle pumps once daily for six consecutive days produced measurable reductions in lower-leg swelling. You can do them while sitting, lying in bed, or watching TV. Calf raises (standing on your toes, then lowering back down) work the same muscle group with a bit more intensity. If you sit for most of the day, setting a reminder to walk for a few minutes every hour makes a real difference.
Cut Back on Sodium
Salt makes your body hold onto water. The more sodium you consume, the more fluid your kidneys retain, and that extra fluid has to go somewhere. For many people with swollen legs, excess sodium is a major contributor they haven’t considered. The World Health Organization recommends less than 2,000 milligrams of sodium per day, which works out to just under a teaspoon of table salt. Most people consume well over that amount, often without realizing it, because the bulk of dietary sodium comes from processed and restaurant food rather than the salt shaker.
Canned soups, deli meats, frozen meals, soy sauce, bread, and cheese are some of the biggest hidden sources. Reading nutrition labels and choosing products with less than 600 mg of sodium per serving is a practical starting point. Cooking at home with fresh ingredients gives you much more control. Some people notice a visible reduction in ankle swelling within a few days of cutting sodium intake, especially if their previous levels were high.
Stay Hydrated
It sounds counterintuitive, but drinking enough water actually helps reduce swelling. When you’re dehydrated, your body responds by holding onto more sodium and fluid. Staying well hydrated keeps your kidneys flushing excess salt efficiently. Plain water is ideal. Alcohol, on the other hand, dilates blood vessels and promotes fluid retention, so cutting back can help if swelling is a recurring problem.
When Swelling Becomes a Bigger Problem
Mild swelling that comes and goes with long days, hot weather, or salty meals is common and usually harmless. But chronic, untreated swelling can damage your skin over time. The constant pressure from trapped fluid causes a condition called venous stasis dermatitis: the skin on your lower legs becomes discolored (often yellowish-brown or reddish), itchy, scaly, and thick. It can feel heavy and achy.
Left unmanaged, the skin can break down into open sores that are slow to heal and prone to infection. Cellulitis, a bacterial skin infection that spreads quickly and requires antibiotics, is one of the more serious complications. Over time, the skin changes can become permanent. Blood clots are another risk associated with chronic venous stasis.
You can gauge how significant your swelling is with a simple test: press your thumb firmly into the swollen area for a few seconds, then release. If the indentation bounces back immediately and is barely visible (about 2 mm deep), that’s mild, grade 1 pitting edema. If the dent is deeper (5 to 6 mm) and takes 15 to 60 seconds to fill back in, you’re looking at grade 3. The most severe form, grade 4, leaves an 8 mm pit that takes two to three minutes to rebound. Anything beyond grade 1 that doesn’t improve with elevation and basic measures warrants medical evaluation.
Prescription Options for Persistent Swelling
When lifestyle changes aren’t enough, doctors sometimes prescribe diuretics, commonly called water pills. These medications work by telling your kidneys to release extra salt and water into your urine, which reduces the total volume of fluid in your body. Different types target different parts of the kidney. Loop diuretics are the most potent and are often used when kidney function is already reduced. Thiazide diuretics are milder and commonly paired with blood pressure treatment. Potassium-sparing diuretics prevent you from losing too much potassium, an important mineral your heart needs.
Diuretics treat the symptom, not the cause. If your swelling is driven by heart failure, venous insufficiency, or kidney disease, managing that underlying condition is what keeps the swelling from coming back. Diuretics also require monitoring because they can shift your electrolyte balance and cause dehydration if the dose is too high.
Putting It All Together
The most effective approach combines several strategies at once. Elevate your legs above your heart for 15 to 20 minutes multiple times a day. Wear compression stockings during waking hours, starting with 15 to 20 mmHg if you’re new to them. Walk regularly and do ankle pumps when you can’t walk. Keep sodium under 2,000 mg per day and drink plenty of water. These measures work best together because they address different parts of the same problem: gravity, muscle inactivity, and fluid overload. Most people with mild to moderate swelling notice a meaningful improvement within a few days of consistently applying all four.