Swelling in the hands and feet happens when fluid builds up in the tissues beneath your skin, a condition called edema. The causes range from something as simple as eating too much salt to serious conditions like heart failure or kidney disease. When swelling appears on both sides of the body, it usually points to a systemic issue. When only one hand or foot swells, the problem is more likely local, such as an injury or a blood clot.
How Fluid Gets Trapped in Your Tissues
Your body constantly moves fluid between your blood vessels and surrounding tissues. Two main forces keep this process balanced: the pressure inside your blood vessels pushing fluid out, and proteins in your blood pulling fluid back in. When either force shifts, fluid leaks into your tissues faster than your lymphatic system can drain it away.
This imbalance can happen in a few ways. Pressure inside your veins can rise too high, forcing extra fluid out. Your blood can lose the proteins that normally draw fluid back into circulation. Or your lymphatic vessels, which act as a drainage network, can become blocked or damaged. Swelling in the hands and feet is especially common because gravity pulls fluid downward throughout the day, and your extremities are the farthest points from your heart.
Salt and Lifestyle Factors
High sodium intake is one of the most common everyday triggers for puffy hands and feet. When you eat excess salt, your kidneys hold onto water to keep sodium levels in your blood balanced. In a controlled study that tracked men living in a simulated space station for over six months, increasing salt intake by 6 grams per day caused the kidneys to conserve an additional 540 milliliters of water daily. That’s roughly two extra cups of fluid your body retains instead of excreting. Most health guidelines recommend keeping salt intake at or below 6 grams per day (about one teaspoon), yet average intake in many populations hovers around 9 to 12 grams.
Sitting or standing in one position for long periods also contributes. When your legs hang down for hours on a plane or at a desk, gravity pools fluid in your feet and ankles. Obesity, limited physical activity, and diabetes all raise your risk as well. Women are more prone to swelling than men, partly due to hormonal fluctuations. Many women notice puffier hands and feet in the days before their period, when shifting hormone levels cause the body to retain more fluid.
Heart, Kidney, and Liver Disease
When swelling affects both hands and feet and doesn’t go away, it can signal that a major organ isn’t working properly. The three organs most often involved are the heart, kidneys, and liver, and each causes swelling through a different pathway.
Heart Failure
A weakened heart pumps less blood with each beat, which slows circulation throughout the body. Your kidneys sense this reduced blood flow and respond by activating hormone systems that tell the body to hold onto salt and water. The result is a vicious cycle: blood volume increases, venous pressure rises, and fluid gets pushed out of blood vessels into the surrounding tissues. Swelling from heart failure is typically symmetrical, affecting both legs, ankles, and sometimes the hands, and it often worsens over the course of the day.
Kidney Disease
Healthy kidneys filter waste and excess fluid from your blood. When kidney function declines, two things happen. First, the kidneys can’t excrete enough sodium and water, so fluid accumulates. Second, in conditions like nephrotic syndrome, the kidneys leak large amounts of protein into the urine. Since blood proteins are what pull fluid back into your vessels, losing them causes fluid to seep into tissues throughout the body, including the hands, face, and feet.
Liver Disease
Your liver produces albumin, the most important protein for keeping fluid inside your blood vessels. When the liver is damaged by cirrhosis or other disease, albumin production drops. At the same time, scarring in the liver raises pressure in the veins that drain your digestive organs, which backs up fluid into the abdomen and lower extremities.
Medications That Cause Swelling
Several widely prescribed drug classes can cause your hands and feet to swell, usually within a few weeks of starting the medication. The swelling is typically soft and affects both sides of the body equally.
- Blood pressure medications (particularly calcium channel blockers like amlodipine) are among the most frequent culprits. They relax blood vessels, which can increase fluid leakage into tissues.
- Anti-inflammatory painkillers (NSAIDs like ibuprofen and naproxen) cause the kidneys to retain sodium and water.
- Nerve pain medications such as gabapentin and pregabalin.
- Steroids like prednisone, which promote fluid retention.
- Diabetes medications in the thiazolidinedione class, including pioglitazone.
- Hormonal treatments including estrogen-containing birth control and hormone replacement therapy.
If you notice new swelling after starting a medication, mention it to your prescriber. Stopping or switching the drug usually resolves it, but never discontinue a medication on your own.
Pregnancy-Related Swelling
Mild swelling in the feet, ankles, and hands is one of the most common pregnancy symptoms, especially in the third trimester. Your blood volume increases by nearly 50% during pregnancy, and the growing uterus puts pressure on the veins that return blood from your legs. Most of this swelling is harmless.
However, sudden or severe swelling, particularly in the face and hands, can be a warning sign of preeclampsia. This condition involves high blood pressure (140/90 or higher on two readings taken at least four hours apart) developing after 20 weeks of pregnancy. Other warning signs include persistent headaches, vision changes, and upper abdominal pain. Preeclampsia requires prompt medical attention because it can progress quickly and affect both mother and baby. That said, edema alone is not enough to diagnose preeclampsia since it occurs in too many normal pregnancies to be a reliable marker on its own.
When Only One Side Swells
Swelling that appears in just one hand, arm, leg, or foot points to a localized problem rather than a whole-body condition. The most concerning cause is a deep vein thrombosis (DVT), a blood clot that forms in a deep vein, most commonly in the leg. Symptoms include swelling, pain or cramping (often starting in the calf), skin that looks red or purple, and warmth over the affected area. Some DVTs cause no noticeable symptoms at all, which makes them particularly dangerous. A clot can break free and travel to the lungs, causing a pulmonary embolism, which is a life-threatening emergency.
Other causes of one-sided swelling include infections (cellulitis), injuries, and lymphedema. Lymphedema develops when lymphatic vessels are blocked or damaged, often after surgery or radiation treatment for cancer. In early stages, the swelling feels soft and doughy. Over time, the tissue becomes firmer and no longer leaves an indent when you press on it.
Pitting vs. Non-Pitting Swelling
One simple observation can help you and your doctor narrow down the cause. Press your fingertip firmly into the swollen area for about 10 seconds, then release. If the indentation lingers for several seconds, that’s pitting edema. If the skin bounces right back, it’s non-pitting.
Pitting edema is associated with heart failure, kidney disease, liver disease, venous insufficiency, DVT, and medication side effects. Non-pitting edema points toward lymphedema, severe hypothyroidism (which causes thick, dry skin with a yellowish tint over the knees, elbows, and palms), or lipedema, a condition involving abnormal fat distribution that predominantly affects women. Lipedema causes symmetrical swelling in the legs that spares the feet, which helps distinguish it from other causes.
What Helps Reduce Swelling
The right approach depends entirely on what’s causing the swelling, but several strategies help across many situations. Elevating your hands or feet above the level of your heart encourages fluid to drain back toward your core. If your feet swell during the day, lying down with your legs propped on pillows for 20 to 30 minutes can make a noticeable difference. Moving regularly, even short walks or calf raises at your desk, activates the muscle pumps in your legs that push blood back toward your heart.
Reducing your salt intake is one of the most effective lifestyle changes. Aiming for 6 grams of salt per day or less (roughly 2,300 milligrams of sodium) can meaningfully reduce how much fluid your body retains. Most excess sodium comes from processed and restaurant food rather than the salt shaker.
Graduated compression stockings apply gentle pressure that helps prevent fluid from pooling in your lower legs. Stockings providing 15 to 20 mmHg of pressure have been shown in multiple trials to reduce edema and symptoms compared to no compression. Higher-compression options (20 to 30 mmHg or above) are available for more severe swelling, though the best level is generally the highest pressure you can comfortably wear throughout the day.
Signs That Swelling Needs Urgent Attention
Most swelling from sitting too long, eating salty food, or mild fluid retention resolves on its own. But certain combinations of symptoms suggest something more dangerous is happening. Seek medical care promptly if your swelling comes with shortness of breath, chest pain, severe pain in the swollen area, fever, or coughing or vomiting blood. Swelling that appears suddenly in just one leg warrants evaluation for a blood clot. Yellowing of the skin or eyes alongside swelling may indicate liver failure. And swelling that spreads rapidly across your body after an insect sting or exposure to an allergen, especially if it involves your face, lips, or throat, is a medical emergency requiring an immediate call to 911.