Are Swollen Feet Dangerous? When Puffiness Is a Signal

By 4 p.m., the sandal straps that fit fine at breakfast are carving grooves into your skin. You slip off a shoe under the desk and can’t quite get it back on. Sound familiar? Foot swelling is one of the most common things people quietly Google, and one of the most misunderstood.

Here’s the honest picture: your feet sit at the bottom of a plumbing system fighting gravity all day, so a little end-of-day puffiness is often just physics. But feet are also an early-warning display for the heart, kidneys, liver, and veins. The same symptom can mean “you stood too long at the farmers market” or “call your doctor today.”

The difference lies in the details, which foot, how fast, and what else came along for the ride. Those details are exactly what this guide walks through, using what mainstream medical evidence actually shows.

Why Do Feet Swell in the First Place?

Roughly 60 percent of an adult’s body is water, and a surprising amount of it moves around all day. Fluid constantly leaks out of tiny capillaries to bathe your tissues, then gets pulled back in by proteins in the blood and swept up by the lymphatic system: a quiet drainage network running alongside your veins.

Swelling, which doctors call edema, happens when that balance tips: more fluid leaks out than the veins and lymph vessels can carry away. Gravity decides where it pools, and your feet are the lowest point on the map. Blood returning from your toes has to climb several feet uphill to reach the heart, relying on one-way valves in the veins and the squeezing action of your calf muscles: a pump that only works when you move.

That’s why a long flight, a full shift at a register, or an evening on the couch can leave ankles puffy even in perfectly healthy people. Sit still, and the calf pump idles.

The tipping points that cause edema fall into a few categories, according to the Mayo Clinic and Cleveland Clinic: leaky or overloaded veins, low levels of blood proteins (a liver or nutrition issue), fluid retention driven by the kidneys or hormones, blocked lymphatic drainage, and inflammation from injury or infection. Every cause in this article is a variation on one of those five themes, which is useful, because the pattern of swelling often hints at which theme you’re dealing with.

The Everyday Causes That Aren't Dangerous

Before worrying about organs, rule in the ordinary. Most puffy feet trace back to habits and circumstances, not disease.

• Standing or sitting for hours. Teachers, nurses, cashiers, and desk workers all know the 5 p.m. ankle. Without calf-muscle movement, fluid settles.
• Heat. Warm weather widens blood vessels, making it easier for fluid to seep into tissue. Summer swelling is common and usually harmless, per the NHS.
• Salty meals. The average American takes in about 3,400 milligrams of sodium a day, well above the 2,300-milligram ceiling the American Heart Association recommends. Sodium tells your kidneys to hold water, and some of that water lands in your ankles by bedtime.
• Long travel. Flights and road trips combine immobility with cramped seating. Mild, both-feet swelling after travel is expected; painful one-sided swelling is not (more on that shortly).
• Hormonal shifts. Many people notice fluid retention in the days before a period.
• Minor injury. A rolled ankle swells because inflammation deliberately floods the area with fluid and repair cells.

The reassuring signature of all these: the swelling affects both feet roughly equally (except injuries), builds over the day, and drains overnight. If you wake up with slim ankles that thicken by evening and you feel otherwise well, the odds strongly favor a benign explanation. The pattern to respect is swelling that no longer resets by morning.

How Do I Know If My Foot Swelling Is Serious?

Think of it as a three-question screen: How fast? Which side? What else?

How fast. Swelling that developed over weeks of long workdays behaves differently from swelling that appeared over hours or a day or two. Sudden is the word that matters. A foot or leg that balloons quickly deserves same-day medical attention, especially with pain.

Which side. Both feet swelling together usually reflects a whole-body cause, gravity, salt, medication, or the heart, kidneys, or liver. One leg swelling alone points to a local problem in that limb: a clot, an infection, an injury, or blocked drainage. One-sided swelling is never explained by “I ate too many chips.”

What else. Companions change everything. Per the Mayo Clinic and NHS, seek urgent care if swelling arrives with any of these:

• Shortness of breath, chest pain, or coughing when lying flat, possible heart involvement or a clot that has traveled to the lungs
• Warmth, redness, or tenderness in one calf, possible deep vein thrombosis or skin infection
• Fever alongside a red, hot, swollen area
• Swelling during pregnancy that comes on suddenly, especially with headache or vision changes
• Skin that looks stretched, shiny, blistered, or is breaking down

None of these guarantee something serious, but each one moves foot swelling from “watch and elevate” to “get examined.” When the screen comes back clean on all three questions, patience and the self-care steps later in this article are reasonable first moves.

One Foot or Both? Why Sidedness Changes Everything

If a clinician could ask you only one question about your swollen feet, many would pick this: is it one side or both?

The logic is anatomical. Whole-body causes: a heart pumping less efficiently, kidneys retaining sodium, a liver making too little protein, a salty week, a new medication, affect the circulation everywhere, so fluid pools in both feet fairly symmetrically. There’s no mechanism by which high sodium intake would choose your left ankle and spare your right.

A single swollen limb, by contrast, means something is happening in that limb: a blood clot blocking a deep vein, a skin infection called cellulitis, an injured ligament or bone, a ruptured fluid-filled cyst behind the knee, or lymphatic drainage damaged by surgery, radiation, or infection. Some of those are minor. One of them, deep vein thrombosis, is the reason single-sided swelling gets treated with urgency, because a fragment of clot can break loose and lodge in the lungs.

A practical caveat: “both feet” doesn’t always mean perfectly equal. Vein valve wear often affects one leg a bit more, and old injuries can leave one ankle chronically puffier. What clinicians watch for is a meaningful, new difference, one calf visibly larger, warmer, or more tender than the other. A cloth tape measure around the widest part of each calf settles the question in ten seconds, and a difference of more than a couple of centimeters is worth reporting rather than pondering.

What Organ Problems Cause Swollen Feet?

Three organ systems show their strain at the ankles, and each leaves a slightly different fingerprint. Swollen feet alone rarely diagnose any of them: it’s the pattern plus companions that tells the story.

Organ system	Typical swelling pattern	Companion clues
Heart	Both feet and ankles, worse by evening, creeping up the legs over time	Breathlessness with activity or lying flat, waking at night gasping, rapid weight gain (2–3 lbs overnight or 5 lbs in a week), fatigue
Kidneys	Both feet, often with puffiness around the eyes in the morning	Foamy urine, urinating less than usual, high blood pressure, nausea
Liver	Both legs plus a swollen, tight abdomen	Yellow tinge to skin or eyes, easy bruising, loss of appetite

The mechanisms differ. A weakened heart lets pressure back up in the veins, forcing fluid out into tissue. Struggling kidneys can’t excrete sodium and water, or, in some kidney diseases, they leak protein into the urine, thinning the blood’s ability to hold onto fluid. A scarred liver makes too little albumin, the main protein that keeps water inside blood vessels, per MedlinePlus.

Two things worth stressing. First, these conditions announce themselves gradually: the tell is swelling that stops resetting overnight and slowly climbs from feet to shins. Second, all three are far more manageable when caught early, which is precisely why persistent, unexplained swelling warrants a checkup rather than a bigger shoe size.

Could It Be a Blood Clot? The One Cause Not to Wait On

Deep vein thrombosis, a clot in one of the large veins of the leg, is the diagnosis behind the rule “one-sided swelling gets seen the same day.” The CDC estimates as many as 900,000 Americans are affected by venous blood clots each year, and up to 100,000 die from complications, most often when a piece of clot travels to the lungs (a pulmonary embolism).

The classic picture: one calf or leg that swells over hours to days, often with a cramping or aching pain, warmth, and skin that looks slightly reddened or discolored. It may feel like a pulled muscle that never got pulled. Notably, per the CDC, about half of people with DVT have few or no obvious symptoms, which is why the ones that do appear deserve respect.

Risk rises after long immobility (flights or drives over about four hours, bed rest, recovery from surgery), during pregnancy and the weeks after delivery, with certain hormone treatments, with cancer, with smoking, and with a personal or family history of clots. Age and obesity add to the tally.

The urgent escalation: if leg swelling is joined by sudden shortness of breath, chest pain that worsens with a deep breath, coughing up blood, or a racing heartbeat, that’s an emergency, call 911. A suspected DVT without lung symptoms still needs same-day evaluation, typically confirmed or ruled out with a painless ultrasound. This is one situation where “let’s see how it looks tomorrow” is the wrong instinct.

Tired Veins: The Most Common Chronic Culprit

Ask why so many people over 50 have puffy ankles by dinnertime, and the answer is usually neither heart nor kidneys: it’s the veins themselves.

Leg veins carry blood uphill using one-way valves, like locks in a canal. With age, weight, pregnancy, long years of standing work, or simple genetics, those valves stretch and leak. Blood pools in the lower legs, pressure builds, and fluid seeps into surrounding tissue. Clinicians call it chronic venous insufficiency; it’s the same process that produces varicose veins, and the Cleveland Clinic notes it’s among the most common causes of long-standing leg swelling.

The signature is predictable and gravity-driven: ankles that are slim in the morning, thicken through the day, ache or feel heavy by evening, and improve with elevation. Over years, the skin above the ankles may darken to a rusty brown (deposited blood pigments), itch, or become fragile. That skin change is a signal to get evaluated, untreated venous disease can eventually lead to slow-healing sores.

The encouraging news: this is one of the most self-care-responsive causes on the list. Elevation, regular walking to work the calf pump, weight management, avoiding long stretches of standing still, and properly fitted gradient compression stockings can meaningfully reduce daily swelling, according to the NHS and Cleveland Clinic. Compression works by gently squeezing the leg, tightest at the ankle, looser toward the knee, helping the leaky canal locks do their job. A clinician can advise on fit and whether compression is safe for you, since it isn’t appropriate for everyone.

Can Medications Make Your Feet Swell?

Quietly, yes, and it’s one of the most overlooked explanations. Several widely used categories of medicine list ankle swelling among their known effects, per the Mayo Clinic and MedlinePlus:

• Some blood pressure medicines that work by relaxing blood vessels, which can let fluid pool in the lower legs
• Steroid medicines, which promote sodium and water retention
• Hormone-containing treatments, including some contraceptives and menopause therapies
• Certain over-the-counter anti-inflammatory pain relievers, which can nudge the kidneys toward holding salt and water
• Some medicines used for diabetes, nerve pain, and mood conditions

The telltale timing: swelling that begins within days to weeks of starting or increasing something new. Both feet are usually affected, the swelling is painless, and it often eases overnight: a pattern that mimics ordinary gravity-driven edema, which is exactly why it gets missed.

Two rules of the road. First, connect the dots out loud: when you mention swelling to your doctor or pharmacist, bring your full list, prescriptions, over-the-counter products, and supplements. What looks like a mystery often resolves into a timeline. Second, never stop a prescribed medicine on your own because of puffy ankles. For some conditions, an abrupt stop is far riskier than the swelling. Prescribers can often adjust the plan, switch approaches, or confirm the swelling is an acceptable trade-off, but that’s a conversation, not a solo decision.

If a medication is the cause, the upside is real: this is among the most fixable forms of edema there is.

Swollen Feet in Pregnancy: Normal vs. Warning Sign

Some ankle swelling is practically a rite of passage in the third trimester. Blood volume expands by nearly half during pregnancy, hormones loosen blood vessels, and the growing uterus presses on the pelvic veins that drain the legs. The result, gradual, both-feet puffiness that’s worse in heat, at day’s end, and after standing, is common and expected, per the NHS.

What’s not expected is sudden swelling. A rapid increase in swelling of the feet, hands, or face, especially after 20 weeks, can be a sign of preeclampsia, a blood-pressure condition of pregnancy that needs prompt medical evaluation. The swelling itself is less telling than its companions:

• A severe or persistent headache
• Vision changes, flashing lights, blurring, or spots
• Pain in the upper right abdomen or just under the ribs
• Sudden weight gain over a day or two
• Nausea or vomiting in the second half of pregnancy

Any of those alongside new swelling means contacting your maternity care team the same day, not waiting for the next scheduled visit. Preeclampsia is treatable when caught, and monitoring is straightforward.

One more pregnancy-specific note: pregnancy raises the risk of blood clots, and that risk persists for several weeks after delivery. The one-sided rule applies with extra force here: a single swollen, tender leg during pregnancy or postpartum warrants same-day evaluation. For routine pregnancy puffiness, the standbys help: side-lying rest, elevating the feet, staying active with walking or swimming, and avoiding long stretches of standing.

What Is Lymphedema, and How Is It Different?

Most swelling in this article involves fluid escaping from blood vessels. Lymphedema is different: the drainage system itself is damaged or overwhelmed. The lymphatic network, think of it as the body’s storm-drain system, normally collects protein-rich fluid from tissues and returns it to the bloodstream. When lymph vessels or nodes are removed, scarred, or blocked, fluid backs up in the limb.

In the United States, the most common trigger is cancer treatment, surgery or radiation that removes or injures lymph nodes, though infections, injury, obesity, and rare inherited conditions can also cause it, per the Cleveland Clinic. Lymphedema may appear months or even years after the original treatment.

How it differs from ordinary edema:

• It’s usually one-sided (or clearly worse on one side), matching where drainage was disrupted
• The swelling often includes the toes and the top of the foot, sometimes making toes look squared-off
• Skin may gradually thicken and feel firm; a clinician may be unable to pinch a fold of skin at the base of the second toe: a classic exam finding
• Elevation helps less than it does with vein-related swelling, and the puffiness tends not to fully reset overnight
• Pressing a finger in may not leave a lasting pit, especially in later stages

Why the distinction matters: lymphedema is managed differently, with specialized compression, skin care to prevent infection, exercise, and manual drainage techniques taught by trained therapists. Earlier recognition means simpler management, so a limb that stays swollen after cancer treatment deserves a specific conversation with your care team, not just bigger socks.

The 15-Second Press Test: Pitting vs. Non-Pitting Swelling

Here’s a piece of bedside medicine you can do on your own couch. Press a thumb firmly into the puffy area, over the shin bone or the top of the foot works well, hold for about 5 to 15 seconds, and let go.

If a dent remains, slowly refilling like a thumbprint in bread dough, that’s pitting edema. It means the swelling is watery, mobile fluid: the kind produced by vein problems, heart or kidney issues, medications, salt, and gravity. Pitting edema is by far the more common type, per MedlinePlus.

If the tissue springs right back with no lasting dent, that’s non-pitting swelling. The fluid is thicker or the tissue itself has changed. The two conditions clinicians think of first are established lymphedema (protein-rich fluid that stiffens tissue over time) and a thyroid-related skin change that can accompany an underactive thyroid. Non-pitting swelling essentially always deserves a medical evaluation, because its causes aren’t the sort that resolve with a salty-food holiday.

The press test is a clue, not a verdict, early lymphedema can pit, and a hard press over inflamed skin isn’t wise. But it gives you and your doctor a useful shared vocabulary. “Both ankles, pits deeply, worse by evening, gone by morning” and “one foot, doesn’t pit, been there for two months” are two very different stories, and being able to tell yours precisely makes any appointment more productive.

While you’re down there, note the skin, too: color changes, warmth, shininess, or any open areas are all details worth reporting.

How Do I Get My Feet to Stop Swelling?

For garden-variety swelling, both feet, no red flags, the evidence supports a short list of unglamorous but genuinely effective moves.

• Elevate above heart level. Feet on an ottoman barely counts; gravity needs a real slope. Lie down with your feet propped on cushions higher than your chest for 20–30 minutes, a few times a day. The NHS specifically recommends this positioning.
• Move the calf pump. Walking is the classic fix, but even seated ankle circles and toe raises, 20–30 repetitions every hour at a desk or on a plane, squeeze blood back uphill.
• Trim the sodium. Most sodium hides in restaurant food, bread, deli meat, sauces, and canned soup rather than the salt shaker. Moving from a typical 3,400 milligrams a day toward 2,300 or less gives your kidneys less reason to retain water, per the American Heart Association.
• Consider compression. Gradient stockings reduce daily pooling for many people with vein-related swelling, ask a clinician about fit and whether they’re appropriate for you.
• Break up stillness. On long flights or drives, stand or stretch at least every hour or two.
• Mind footwear. Shoes that accommodate late-day swelling beat shoes that tourniquet it.
• Work toward a comfortable weight if advised. Extra abdominal pressure impedes leg-vein drainage.

Give these measures one to two weeks. Swelling that persists despite honest effort, or ever fails the three-question screen from earlier, moves the plan from home care to a doctor’s visit.

What to Drink to Reduce Swelling in Feet? Separating Sips from Myths

The internet offers a beverage for everything, so let’s hold the popular claims up to the evidence.

Plain water: genuinely useful, for a counterintuitive reason. Skimping on fluids doesn’t shrink swelling, mild dehydration prompts the body to release hormones that tell the kidneys to conserve sodium and water, which can worsen retention. Steady hydration keeps that conservation reflex quiet. Water isn’t a magic drain, but under-drinking actively works against you.

“Detox” teas and waters: skip the hype. Cucumber-lemon water is pleasant and hydrating; it does not possess special fluid-flushing powers beyond the water itself. Herbal products marketed as natural water-shedders are largely untested for safety and effectiveness, and NIH’s Office of Dietary Supplements notes that supplements aren’t reviewed for effectiveness before sale. Some can interact with medications, worth a pharmacist conversation before experimenting.

Alcohol: a two-act problem. It dehydrates you first, then the rebound fluid retention arrives over the next day or two. Puffy ankles after a big weekend are a recognized pattern.

Sugary drinks and sodium-heavy beverages: sports drinks, vegetable juice cocktails, and some flavored waters carry meaningful sodium, read labels.

What about potassium-rich foods? Here the evidence is friendlier: potassium helps the body excrete sodium, and the American Heart Association highlights potassium-rich eating patterns (fruits, vegetables, beans, yogurt) as a counterweight to salt. People with kidney disease need medical guidance before increasing potassium.

The honest summary: no drink shrinks swollen feet on its own. Adequate water, less alcohol, less hidden sodium, more potassium from food: that combination has evidence behind it. Everything else is mostly marketing.

When to See a Doctor, and When to Call 911

Every symptom article should be clear on this, so here it is without hedging.

Call 911 or seek emergency care if swelling comes with any of the following, per the Mayo Clinic and CDC:

• Sudden shortness of breath or difficulty breathing
• Chest pain, pressure, or pain that worsens with a deep breath
• Coughing up blood
• Fainting, severe lightheadedness, or a racing, irregular heartbeat

These can signal a clot in the lungs or acute heart trouble. Minutes matter; driving yourself is not the plan.

See a doctor the same day if you notice:

• One leg newly swollen, especially with pain, warmth, or redness
• A red, hot, tender area with fever, possible skin infection
• Sudden swelling during pregnancy, or swelling with headache or vision changes
• Swelling after a period of immobility, surgery, or a long trip

Book a routine appointment within days to a couple of weeks when:

• Both feet stay swollen despite a week or two of elevation, movement, and less sodium
• Swelling no longer resets overnight, or is slowly creeping up the legs
• You’ve gained several pounds in under a week without explanation
• Swelling began after starting a new medication
• The skin over the swelling is darkening, thickening, itching, or breaking down

A useful mental model: emergencies involve the chest and breathing, urgencies involve one leg or pregnancy, and routine visits cover the persistent, symmetric, slow-building kind. When in doubt, a phone call to your clinic or nurse line costs nothing and settles the question quickly.

What Will the Doctor Actually Do?

Knowing what to expect lowers the barrier to going, and the workup for swollen feet is refreshingly low-tech at the start.

The conversation carries the most weight. Expect questions about timing (sudden or gradual, morning or evening), sidedness, travel, pregnancy, new medications and supplements, alcohol, and companions like breathlessness, urine changes, or weight gain. Coming prepared with that timeline, even a few notes on your phone, genuinely speeds diagnosis.

The exam is hands-on. The clinician will press for pitting, compare calf sizes, check pulses and skin, listen to your heart and lungs, look at neck veins, and feel your abdomen. Much of the organ-level story from earlier in this article is readable right there in the room.

Tests follow the leads, not a fixed menu. Depending on suspicion, per the Cleveland Clinic and MedlinePlus, these may include:

• Blood tests assessing kidney function, liver function, protein levels, and thyroid activity
• A urine test checking for leaked protein
• A leg ultrasound if a clot or vein valve problem is suspected, painless and quick
• A chest X-ray or heart ultrasound (echocardiogram) if the heart is in question

Many visits end without any imaging at all: a medication timeline, an exam consistent with vein wear, and a plan built on compression, elevation, and follow-up. And that’s the fitting last word on whether swollen feet are dangerous, usually they aren’t, occasionally they’re the earliest visible sign of something that matters, and a straightforward evaluation is what reliably tells the two apart.

Frequently asked questions

How do I know if my foot swelling is serious?

Run a three-question screen: how fast, which side, and what else. Swelling that developed suddenly, affects only one leg, or arrives with shortness of breath, chest pain, calf pain, fever, or redness needs prompt medical attention. Gradual, both-feet puffiness that worsens through the day and drains overnight is usually benign. Swelling that stops resetting by morning, or persists despite a week or two of elevation and less sodium, deserves a routine doctor’s visit.

What organ failure causes swollen feet?

Three organ systems can show strain at the ankles: the heart, kidneys, and liver. A weakened heart lets pressure back up into leg veins; struggling kidneys retain sodium and water or leak protein into urine; a scarred liver makes too little albumin, the protein that holds fluid inside blood vessels. Each leaves companions, breathlessness with heart trouble, foamy urine with kidney disease, abdominal swelling or yellow-tinged skin with liver disease: that help doctors tell them apart.

What should I drink to reduce swelling in my feet?

Plain water, steadily through the day, is the evidence-backed choice, under-drinking triggers hormones that make your body hold sodium and fluid, which worsens swelling. No beverage actively flushes edema; detox teas and infused waters have no proven fluid-shedding powers beyond hydration itself. Cutting alcohol and sodium-heavy drinks helps more than adding anything. Potassium-rich foods like fruits, vegetables, and beans support sodium excretion, though people with kidney disease should ask their doctor first.

How do I get my feet to stop swelling?

Elevate your feet above heart level for 20–30 minutes several times daily, walk regularly to work the calf-muscle pump, and cut sodium toward 2,300 mg a day. Gradient compression stockings help many people with vein-related swelling, ask a clinician about proper fit. Break up long sitting or standing every hour. Give these steps one to two weeks; swelling that persists, or ever becomes one-sided or painful, needs medical evaluation rather than more home care.

Is one swollen foot worse than two?

Generally, yes, one-sided swelling deserves faster attention. Both feet swelling together usually reflects a whole-body cause like gravity, salt, medication, or heart, kidney, or liver strain. A single swollen limb means something is happening in that limb: a blood clot, skin infection, injury, or blocked lymphatic drainage. Because a deep vein clot can travel to the lungs, a newly swollen single leg, especially warm, tender, or reddened, warrants same-day medical evaluation.

Can dehydration cause swollen feet?

Indirectly, it can make swelling worse. When you’re mildly dehydrated, the body releases hormones that instruct the kidneys to conserve sodium and water, and some of that retained fluid pools in the feet. Alcohol produces a similar two-step: dehydration first, rebound fluid retention over the next day or two. Staying consistently hydrated keeps this conservation reflex quiet, which is why restricting fluids is exactly the wrong strategy for puffy ankles.

Why do my feet swell on airplanes?

Hours of sitting idle the calf-muscle pump that normally squeezes blood back uphill toward your heart, so fluid settles in the lowest point: your feet. Cabin conditions and cramped seating add to it. Mild, both-feet swelling after a flight is normal and fades with movement. Reduce it by doing ankle circles and toe raises every hour, walking the aisle, and staying hydrated. Painful one-sided leg swelling after a flight over four hours needs same-day evaluation for a clot.

Does walking help or worsen swollen feet?

For most causes, walking helps. Each calf-muscle contraction squeezes leg veins and pushes pooled blood uphill, which is why movement is a first-line recommendation for vein-related and gravity-driven swelling. The exceptions are swelling from an acute injury, which needs rest and elevation initially, and a suspected blood clot, which needs medical evaluation before an exercise plan. If ordinary walking makes swelling reliably worse rather than better, mention that pattern to your doctor: it’s a useful clue.

When is pregnancy swelling an emergency?

When it’s sudden. Gradual, both-feet puffiness in later pregnancy is common and expected. But rapid new swelling of the feet, hands, or face, particularly after 20 weeks, can signal preeclampsia, especially alongside a severe headache, vision changes, upper-right abdominal pain, or sudden weight gain. Contact your maternity team the same day. Separately, one swollen, tender leg during pregnancy or the postpartum weeks warrants same-day evaluation, because pregnancy raises blood-clot risk.

Can swollen feet be a sign of a blood clot?

Yes: a deep vein thrombosis typically causes swelling in one leg, often with cramping pain, warmth, and reddened or discolored skin, developing over hours to days. About half of people with DVT have few obvious symptoms, per the CDC, so the visible signs deserve respect. Risk rises after long travel, surgery, immobility, and during pregnancy. If leg swelling comes with sudden breathlessness, chest pain, or coughing up blood, call 911: a clot may have reached the lungs.

References

• MedlinePlus: Foot, Leg, and Ankle Swelling
• Cleveland Clinic: Edema: Causes and Treatment
• CDC: About Venous Thromboembolism (Blood Clots)

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.