Mild water retention usually responds well to a combination of dietary changes, movement, and simple positioning strategies. The puffiness you notice in your ankles, fingers, or face is fluid that has shifted out of your blood vessels and into the surrounding tissue, and in most cases you can coax it back into circulation without medication. Here’s what actually works and why.
Why Your Body Holds Onto Water
Your body constantly balances fluid between your bloodstream and the spaces around your cells. Sodium is the main driver of this balance. When sodium levels rise in those spaces, water follows to dilute it, and the tissue swells. Your kidneys also play a role: when you’re not drinking enough, your brain releases an antidiuretic hormone that tells your kidneys to hold onto water rather than excrete it. People who drink less than 1.2 liters of water per day have significantly higher levels of this hormone compared to those drinking over 2 liters.
Gravity matters too. Fluid naturally pools in the lowest parts of your body. If you sit or stand for hours, your legs and ankles absorb the brunt of it. Hormonal shifts, particularly before a menstrual period, add another layer. Many people experience bloating one to two days before their period starts, though some notice it five or more days out. Changes in hormone levels during the second half of the cycle cause the body to retain more fluid temporarily.
Cut Back on Sodium
The U.S. Dietary Guidelines recommend no more than 2,300 milligrams of sodium per day for adults. Most people exceed that by a wide margin, largely from processed and restaurant foods rather than the salt shaker on the table. Bread, deli meat, canned soup, frozen meals, sauces, and cheese are some of the biggest contributors.
You don’t need to eliminate sodium entirely. Your body needs it. But reducing your intake to around that 2,300 mg ceiling, or ideally lower, gives your kidneys less sodium to deal with and reduces the osmotic pull that draws water into your tissues. Reading nutrition labels is the fastest way to find where the sodium is hiding. Swapping processed foods for whole foods like fresh vegetables, fruit, and unprocessed meat makes a noticeable difference within a few days.
Drink More Water, Not Less
It sounds counterintuitive, but drinking more water helps your body release stored fluid. When you’re chronically under-hydrated, your body ramps up antidiuretic hormone production to conserve every drop. In one study, when people who typically drank very little increased their water intake over six weeks, their levels of this conservation hormone dropped by roughly 25%. That signals the kidneys to let more water go.
There’s no single magic number for how much to drink. A reasonable starting point is around 2 liters per day for most adults, adjusted upward if you’re active, in a hot climate, or larger-bodied. The color of your urine is a practical gauge: pale yellow means you’re well hydrated, dark yellow means you need more.
Eat More Potassium-Rich Foods
Potassium works as a counterbalance to sodium. It helps your kidneys excrete excess sodium and the water that tags along with it. Rather than supplementing, focus on food sources: bananas, sweet potatoes, spinach, avocados, beans, yogurt, and tomatoes are all rich in potassium. Most people fall short of the recommended daily intake, so even modest increases can help shift the sodium-potassium balance in the right direction.
Move Your Body to Pump Fluid
Your lymphatic system, the network responsible for draining excess fluid from tissues, doesn’t have its own pump. It relies on muscle contractions to push fluid along. This is why sitting or standing still for hours leads to swollen legs and why movement is one of the most effective remedies.
Walking is the simplest option. The rhythmic contraction of your calf muscles acts like a squeeze pump, pushing fluid upward out of your lower legs. Any form of exercise works, from swimming to cycling to strength training. Even gentle, targeted movements make a difference if you have limited mobility. Memorial Sloan Kettering recommends a set of simple exercises performed twice daily, each repeated 10 times:
- Deep belly breathing: Place your hands on your abdomen, inhale slowly through your nose so your belly rises, then exhale through pursed lips while gently drawing your abdomen inward.
- Seated marches: While sitting, slowly raise one knee without leaning back, lower it, then repeat with the other leg.
- Heel and toe raises: Sitting with feet flat, flex your toes upward while keeping heels on the floor, then point toes down and lift your heels.
- Ankle circles: Rotate each ankle 10 times clockwise, then 10 times counterclockwise.
- Mini squats: While standing, slowly bend your hips and knees to about a 45-degree angle, then straighten back up while squeezing your glutes.
- Heel raises: While standing, push up onto your toes, then slowly lower back down.
These are especially useful during long flights, desk-bound workdays, or recovery periods after surgery when full exercise isn’t an option.
Elevate Your Legs
Gravity works against you all day, so use it in your favor when you can. Lie down and position your legs above the level of your heart, propped on pillows or against a wall. Aim for about 15 minutes at a time, three to four times per day. This allows fluid to drain passively from your lower extremities back toward your core, where it can be filtered and excreted by your kidneys. It’s most effective when combined with the other strategies here, not as a standalone fix.
Try Compression Socks
Compression stockings apply graduated pressure to your legs, tightest at the ankle and loosening as they go up. This prevents fluid from settling into the tissue and helps push it back into circulation. For mild everyday swelling, stockings in the 15 to 20 mmHg range provide gentle support. If you have moderate swelling, post-surgical swelling, or a history of vein problems, the 20 to 30 mmHg range is typically more effective. Put them on first thing in the morning, before gravity has had a chance to pull fluid downward.
Hormonal Water Retention
If your water retention follows a predictable monthly pattern, it’s almost certainly tied to hormonal fluctuations in your menstrual cycle. The bloating tends to peak in the days just before your period and resolves once menstruation starts. You can’t prevent the hormonal shift, but the same strategies listed above, especially reducing sodium, staying well hydrated, and exercising, help minimize how much fluid your body retains during that window. Magnesium-rich foods like dark chocolate, nuts, and leafy greens may also help, as some evidence suggests magnesium supports fluid balance during this phase of the cycle.
What About Supplements and Herbal Remedies
Dandelion root is one of the most commonly recommended natural diuretics, but the evidence behind it is thin. Despite extensive traditional use, clinical trials have not confirmed that it reliably reduces fluid retention. If you want to try it, the German Commission E suggests 3 to 4 grams of dandelion root or 10 to 15 drops of root tincture twice daily, but these are traditional dosing guidelines rather than clinically validated ones.
Magnesium supplements (around 200 to 400 mg per day) have somewhat better support for reducing premenstrual bloating specifically, and many people are mildly deficient to begin with. Vitamin B6 is another common suggestion for cycle-related retention. Both are generally safe at moderate doses, but food sources remain the most reliable and balanced way to get these nutrients.
When Swelling Points to Something Serious
Most water retention is harmless and temporary. But certain patterns signal something that needs medical attention. Swelling around the eyes along with leg puffiness can indicate kidney disease, which causes the body to retain both fluid and salt. Swelling concentrated in the abdomen, sometimes alongside leg swelling, can point to liver damage. Congestive heart failure causes blood to back up in the legs, ankles, and feet because the heart isn’t pumping efficiently.
Seek immediate care if swelling is accompanied by shortness of breath, chest pain, or an irregular heartbeat, as these can signal fluid buildup in the lungs. Also call your doctor if one leg suddenly becomes painful and swollen after prolonged sitting, such as a long flight, as this may be a blood clot rather than simple fluid retention.