Water retention happens when excess fluid builds up in your body’s tissues, causing puffiness, tightness, and visible swelling, most often in the hands, feet, ankles, and legs. The good news is that most mild cases respond well to straightforward changes in diet, movement, and daily habits. Here’s what actually works and why.
Cut Back on Sodium
Sodium is the single biggest dietary driver of water retention. When you eat more salt than your body needs, your kidneys hold onto extra water to keep the concentration of sodium in your blood stable. That extra fluid ends up in your tissues.
The CDC recommends staying under 2,300 mg of sodium per day for adults, which is roughly one teaspoon of table salt. Most people exceed that without realizing it, because the bulk of dietary sodium comes from processed and restaurant food, not the salt shaker. Canned soups, deli meats, frozen meals, soy sauce, and many condiments are major sources. Reading nutrition labels and cooking more meals at home are the most reliable ways to bring your intake down.
Eat More Potassium-Rich Foods
Potassium works opposite to sodium in your kidneys. While sodium tells your body to hold water, potassium signals the kidneys to release it. The two minerals operate as a balancing act, so increasing potassium can offset the fluid-retaining effects of sodium even before you’ve cut salt dramatically.
Bananas get all the credit, but plenty of foods deliver more potassium per serving: sweet potatoes, white beans, spinach, avocados, yogurt, salmon, and coconut water. Focusing on whole, unprocessed foods naturally shifts your potassium-to-sodium ratio in the right direction.
Move Your Body Daily
Your lymphatic system is responsible for draining excess fluid from tissues and returning it to your bloodstream, but it has no pump of its own. Unlike blood, which the heart pushes through your veins and arteries, lymph fluid relies entirely on muscle contractions to move. When you sit or stand still for long stretches, fluid pools in your lower legs simply because there’s nothing pushing it back up.
Walking, swimming, cycling, yoga, and tai chi all engage large muscle groups that circulate lymph fluid effectively. Even small movements help. Shoulder rolls, ankle pumps, and seated marching can make a noticeable difference during a long day at a desk or on a plane. Deep belly breathing is another piece of the puzzle: the rhythmic expansion of your diaphragm pumps the largest lymphatic pathways in your body. Combining gentle movement with deliberate deep breaths gives your lymphatic system the strongest push.
Elevate Your Legs
Gravity works against you all day. If your ankles and feet tend to swell, elevating your legs above the level of your heart lets gravity work in your favor for a change, helping fluid drain back toward your core. Use a pillow or a cushion to prop your legs up while lying down, keeping them above your chest.
Aim for about 15 minutes at a time, three to four times a day. This is especially useful at the end of a workday or after long periods of standing. It won’t fix the underlying cause of chronic swelling, but it reliably reduces the immediate puffiness.
Consider Magnesium and Vitamin B6
Both of these nutrients play a role in how your body manages fluid, and low levels of either can worsen retention, particularly around your menstrual cycle. A randomized controlled trial in 94 women found that taking 80 mg of vitamin B6 daily over three menstrual cycles significantly reduced bloating along with other PMS symptoms like irritability and anxiety.
Magnesium supports hundreds of enzymatic processes, including those that regulate fluid balance. Many people fall short of the recommended daily intake. Rather than jumping to high-dose supplements, try increasing food sources first: dark leafy greens, nuts, seeds, dark chocolate, and whole grains are all rich in magnesium. If you suspect a deficiency, a simple blood test can confirm it.
Try Natural Diuretic Teas
Dandelion root tea acts as a gentle, volume-based diuretic, meaning it increases urine output and nudges your liver and digestive systems into clearing fluid. Cleveland Clinic notes that you can start with one cup a day and build up to two or three cups as your body adjusts. Because it does increase urination noticeably, start slowly.
One important caution: if you’re already taking a prescription diuretic (a “water pill”), adding dandelion tea on top can push fluid loss too far. The combination can lead to dehydration or electrolyte imbalances, so talk to your prescriber first.
Check Your Medications
Several common medications cause water retention as a side effect, and if your swelling started around the same time as a new prescription, the drug may be the culprit.
- Blood pressure medications: Calcium channel blockers are the most frequent offenders. Nearly half of people taking them experience some swelling in the feet and ankles. Beta blockers and a few other blood pressure drugs can do the same.
- Hormone medications: Corticosteroids, estrogen, progesterone, and testosterone all promote fluid retention.
- Pain relievers: Over-the-counter NSAIDs like ibuprofen and naproxen can cause your body to hold onto sodium and water.
- Nerve pain and seizure drugs: Gabapentin and pregabalin frequently cause peripheral swelling.
- Antidepressants: A class called MAOIs can contribute to edema, though these are prescribed less commonly today.
Never stop a medication on your own because of swelling. But bringing it up with your prescriber is worth doing, because switching to a different drug in the same class often resolves the problem entirely.
Stay Hydrated
It sounds counterintuitive, but drinking more water can reduce retention. When you’re mildly dehydrated, your body interprets the low fluid intake as a signal to conserve what it has, holding onto water more aggressively. Consistent hydration reassures your kidneys that it’s safe to let fluid go. Plain water is ideal. Caffeinated drinks do have a mild diuretic effect, but they’re not a substitute for steady water intake throughout the day.
When Swelling Needs Medical Attention
Mild, symmetrical puffiness that comes and goes with heat, salt, or long sitting is usually harmless. Pitting edema is different. If you press a swollen area with your finger and a dent stays behind for several seconds before filling back in, that’s pitting edema, and it warrants a medical evaluation. The deeper the dent and the longer it takes to refill, the more serious the underlying cause may be.
Certain combinations of symptoms signal something more urgent: shortness of breath alongside swelling, swelling in only one leg (which can indicate a blood clot), pain or skin discoloration over the swollen area, open sores on swollen skin, or difficulty walking because of the swelling. Any of these patterns call for prompt medical attention rather than home remedies.