Swelling happens when excess fluid builds up in your tissues, and reducing it depends on what’s causing it. For most people dealing with puffy legs, swollen ankles, or general bloating, a combination of movement, dietary changes, compression, and elevation can make a noticeable difference. The approach that works best for you will depend on whether your swelling stems from an injury, prolonged sitting, diet, or an underlying health condition.
Why Your Body Retains Fluid
Swelling in the body generally falls into two categories. Edema is fluid leaking from blood vessels into surrounding tissues, often caused by heart failure, kidney disease, liver problems, poor circulation, or certain medications. Inflammation is your immune system responding to injury, infection, or irritation by sending white blood cells and chemicals to the area to begin healing. Inflammation may or may not involve visible swelling.
The distinction matters because the remedies differ. An inflamed, sprained ankle needs rest and ice. Swollen legs from sitting at a desk all day need movement and elevation. Whole-body puffiness tied to a high-sodium diet needs nutritional changes. Many people experience a mix of these, so layering several strategies together tends to produce the best results.
Cut Sodium, Add Potassium
Sodium is the single biggest dietary driver of fluid retention. It pulls water into your bloodstream and tissues, and most people eat far more than they need. The World Health Organization recommends less than 2,000 mg of sodium per day, which is just under a teaspoon of table salt. The average intake in most Western countries is roughly double that, largely from processed foods, restaurant meals, canned soups, and deli meats.
Potassium works as sodium’s counterbalance. Both are electrolytes that help your body maintain fluid and blood volume, but potassium helps your kidneys flush excess sodium out through urine. Good sources include bananas, oranges, melons, potatoes, sweet potatoes, and cooked spinach and broccoli. Rather than obsessing over supplements, simply shifting your plate toward more whole vegetables and fruit while cutting back on packaged foods can meaningfully lower your sodium-to-potassium ratio within days.
Drink More Water, Not Less
It sounds backward, but staying well hydrated actually reduces fluid retention. When your body senses dehydration, it holds onto whatever water it has, storing it in your tissues as a survival mechanism. Drinking enough water signals that there’s no shortage, so your kidneys release the excess. A well-hydrated body is less likely to retain fluid. Aim for steady intake throughout the day rather than large amounts all at once.
Use Elevation and Ice for Acute Swelling
If your swelling is from an injury, surgery, or a long day on your feet, elevation and ice are your first tools. Elevate the swollen area above heart level so gravity helps drain fluid back toward your core. For your legs, this means lying down and propping your feet on a stack of pillows, not just resting them on an ottoman while you sit upright.
Ice constricts blood vessels and slows the flow of fluid into damaged tissue. Apply it with a cloth barrier (never directly on skin) for 10 to 20 minutes at a time, repeating every hour or two as needed. This is most effective in the first 48 to 72 hours after an injury. Beyond that window, gentle movement typically does more to resolve lingering swelling than continued icing.
Move Your Lymphatic System
Your lymphatic system is essentially a drainage network that collects excess fluid from your tissues and returns it to your bloodstream. Unlike your cardiovascular system, it has no pump. It relies entirely on muscle contractions and breathing to keep fluid moving. This is why sitting or standing in one position for hours causes your legs and feet to swell, and why even light exercise can reverse it.
Memorial Sloan Kettering Cancer Center recommends a specific set of lymph drainage exercises, and they’re surprisingly simple. Start with deep belly breathing: place your hands on your abdomen, breathe in slowly through your nose so your belly rises (keep your chest still), then exhale slowly through pursed lips while gently pulling your abdomen inward. Repeat 10 times. This creates pressure changes in your torso that help pump lymph fluid.
From a seated position, try these movements, 10 repetitions each:
- Seated marches: Slowly raise one knee without leaning back, lower it, then switch legs.
- Knee extensions: Straighten one leg out in front of you, hold for a count of one, lower it, then switch.
- Heel and toe raises: Flex your toes up toward your nose with heels on the floor, then point your toes down and lift your heels.
- Ankle circles: Rotate one ankle clockwise 10 times, then counterclockwise 10 times. Repeat with the other ankle.
If you can stand comfortably, add mini squats (bending knees to about 45 degrees), side leg lifts held for five seconds, and hamstring curls where you bring your heel toward your buttock. Do these twice a day, counting each repetition out loud so you keep breathing steadily throughout. Never push through pain.
Try Compression Garments
Compression stockings or sleeves apply graduated pressure to your limbs, squeezing fluid upward and preventing it from pooling. They come in several levels measured in millimeters of mercury (mmHg):
- 15 to 20 mmHg (mild): Good for tired, achy legs, air travel, or minor swelling from standing all day. Available without a prescription.
- 20 to 30 mmHg (moderate): The most commonly prescribed level for managing mild to moderate swelling and early-stage vein problems.
- 30 to 40 mmHg (firm): Used for more significant swelling, often paired with custom-fit garments.
- 40 to 50 mmHg and above: Reserved for severe cases after clinical assessment.
For everyday fluid retention, a mild or moderate pair from a pharmacy is a reasonable starting point. Put them on first thing in the morning before swelling has a chance to build. They should feel snug but not painful, and you should be able to slide a finger under the top band.
Address Medication-Related Swelling
Several common medications cause fluid retention as a side effect, including certain blood pressure drugs, steroids, hormone therapies, and some diabetes medications. If your swelling started or worsened after beginning a new prescription, that connection is worth exploring with your prescriber. Adjusting the dose or switching to an alternative often resolves the problem. Prescription water pills (diuretics) can treat more persistent edema, but they require medical oversight because they alter your electrolyte balance.
When Swelling Signals Something Serious
Most fluid retention is uncomfortable but not dangerous. However, certain patterns warrant prompt medical attention. Swelling in only one leg, especially if accompanied by pain or cramping in the calf, skin color changes (reddish or purplish), and warmth in the affected leg, can indicate a deep vein thrombosis (DVT), which is a blood clot. DVT can sometimes occur without noticeable symptoms, which makes sudden one-sided leg swelling worth taking seriously.
Swelling that leaves a visible dent when you press your finger into the skin (called pitting edema), swelling that spreads to your abdomen or face, or swelling paired with shortness of breath can point to heart, kidney, or liver problems. Rapid, unexplained weight gain of several pounds over a few days is another signal that your body is holding onto an unusual amount of fluid. In these cases, the swelling itself isn’t the core problem; it’s a symptom of something that needs treatment.