Most water retention responds well to a handful of lifestyle changes, particularly adjustments to what you eat, how you move, and how you position your body throughout the day. The swelling you notice in your ankles, fingers, or midsection happens when fluid builds up in the spaces between your cells instead of circulating normally. Here’s what actually works to get that fluid moving again.
Cut Sodium and Increase Potassium
Sodium is the single biggest dietary driver of water retention. Your body maintains a precise ratio of sodium to water, so when you eat more salt, your tissues hold onto extra fluid to keep that ratio balanced. The World Health Organization recommends staying under 2,000 mg of sodium per day (just under a teaspoon of table salt), but most people consume well over that amount without realizing it. Processed foods, restaurant meals, canned soups, deli meats, and condiments are the main culprits.
Potassium works as sodium’s counterpart. It helps your kidneys flush excess sodium and the water clinging to it. The WHO recommends at least 3,510 mg of potassium per day. You can get there by eating bananas, sweet potatoes, spinach, avocados, white beans, and salmon regularly. Increasing potassium while decreasing sodium creates a powerful shift in your fluid balance, often producing noticeable results within a few days.
Drink More Water, Not Less
It sounds counterintuitive, but drinking more water helps you retain less. When you’re dehydrated, your body releases a hormone called vasopressin (also known as antidiuretic hormone), which signals your kidneys to hold onto as much water as possible. This is a survival mechanism: your body doesn’t know if more water is coming, so it hoards what it has. The result is puffiness and bloating even though you feel thirsty.
Staying consistently hydrated tells your body it’s safe to let fluid go. Aim for steady intake throughout the day rather than gulping large amounts at once. If your urine is consistently pale yellow, you’re likely well hydrated enough that your body won’t trigger that retention response.
Use Movement as a Fluid Pump
Your muscles act as a mechanical pump for fluid circulation. Every time a muscle contracts, it compresses nearby veins and lymph vessels, pushing fluid back toward the heart and reducing pooling in the lower body. This is why your legs and ankles swell more on days you sit or stand in one position for hours: the pump isn’t running.
Dynamic movement, where muscles activate and relax in a rhythmic pattern, is more effective than static holds. Walking, cycling, swimming, and even calf raises at your desk all activate this pump. The key is frequency rather than intensity. A five-minute walk every hour does more for fluid retention than a single hard workout followed by eight hours of sitting. If you work at a desk, flexing and pointing your feet, doing ankle circles, or simply shifting your weight from side to side keeps fluid from settling in your lower legs.
Elevate Your Legs
Gravity pulls fluid downward all day. Reversing that pull is one of the simplest and most effective ways to reduce swelling in your feet, ankles, and calves. Lie down and prop your legs on pillows so they’re positioned above the level of your heart. Hold this position for about 15 minutes, three to four times a day if you can manage it. Even once in the evening after a long day makes a noticeable difference.
This works best as a consistent daily habit rather than a one-time fix. If you’re prone to swelling during flights or long car rides, elevating your legs as soon as you arrive at your destination helps the fluid redistribute faster.
Try Compression Garments
Compression socks and stockings apply steady, graduated pressure to your lower legs, preventing fluid from accumulating in the first place. They’re measured in millimeters of mercury (mmHg), and the right level depends on how much swelling you typically experience:
- 15 to 20 mmHg: Best for mild ankle swelling, long flights, and days spent sitting or standing. Available without a prescription.
- 20 to 30 mmHg: Suited for moderate swelling, varicose veins, and post-surgical recovery. Some brands sell these over the counter, though your doctor may recommend a specific fit.
Put them on first thing in the morning before swelling starts, since they work by preventing fluid buildup rather than reversing it once it’s already there.
Address Hormonal Water Retention
Many women notice significant bloating and fluid retention in the days leading up to their period. This is driven by shifts in estrogen and progesterone that affect how the kidneys handle sodium and water. The retention typically peaks in the late luteal phase (the week before your period) and resolves once menstruation begins.
Magnesium supplementation can help. One study found that women taking 200 mg of magnesium daily had less fluid retention by their second month on the supplement. WebMD notes that a dose of around 360 mg per day may help with bloating, fluid retention, and breast tenderness associated with PMS. Foods rich in magnesium include dark chocolate, almonds, pumpkin seeds, and leafy greens, though a supplement can fill the gap if your diet falls short.
Natural Diuretic Foods and Drinks
Certain foods and herbs have mild diuretic effects, meaning they increase urine output and help your body shed excess fluid. Dandelion leaf extract has been studied in humans and shown to significantly increase both urination frequency and fluid excretion within hours of consumption. The effect was measurable within a single day in a study published in the Journal of Alternative and Complementary Medicine. You can consume dandelion as a tea, a supplement, or even in salads using fresh leaves.
Other foods with natural diuretic properties include celery, cucumber, watermelon, asparagus, and parsley. Black and green tea also have mild effects. These won’t produce anything close to the effect of a prescription diuretic, but as part of a broader strategy, they contribute to fluid balance. Coffee counts too, though its diuretic effect diminishes as your body develops tolerance with regular use.
Watch Your Carbohydrate Intake
Carbohydrates cause your body to store water. For every gram of glycogen (the stored form of carbs) your muscles and liver hold, they also retain roughly 3 grams of water. This is why people on low-carb diets lose several pounds of water weight in the first week, and why a carb-heavy meal can leave you feeling puffy the next morning.
You don’t need to eliminate carbs, but if you’re prone to retention, reducing refined carbohydrates like white bread, pasta, pastries, and sugary snacks can make a meaningful difference. Spreading your carb intake more evenly throughout the day, rather than eating large amounts at dinner, also helps prevent overnight fluid buildup.
When Swelling Signals Something Bigger
Most water retention is harmless and responds to lifestyle changes. But certain patterns warrant attention. Swelling that affects both legs equally, or that appears in your face, hands, and abdomen simultaneously, can point to systemic causes like heart, kidney, or liver problems. If you press a finger into the swollen area and the indentation stays visible for several seconds (called pitting edema), that’s worth mentioning to your doctor, especially if it’s new or worsening.
Swelling in only one leg, particularly if it’s accompanied by redness, warmth, or pain, can indicate a blood clot and needs prompt medical evaluation. Sudden, rapid swelling over hours rather than days is also a red flag. Chronic retention that doesn’t improve with the strategies above may need investigation to rule out underlying conditions affecting your heart, kidneys, thyroid, or liver.