What causes swollen ankle? 37 possible conditions

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What Is Foot, Leg, and Ankle Swelling?

Foot, leg, and ankle swelling—also known as peripheral edema—refers to an accumulation of fluid in these parts of the body. The buildup of fluid is not usually painful, unless it is due to injury. Swelling is often more apparent in the lower area of the body because of gravity.

Older people frequently experience this type of swelling. While it usually does not pose a significant health risk, it is important to know when to see a doctor since swelling may indicate a more serious underlying health issue.

What Are the Main Causes of Foot, Leg, and Ankle Swelling?

There are many potential causes of foot, leg, and ankle swelling. They include certain lifestyle conditions or medications, such as:

  • being overweight
  • standing for prolonged periods of time
  • being confined for long periods of time (especially during car rides or flights)
  • taking estrogen or testosterone
  • taking certain antidepressants, such as tricyclics or MAO inhibitors
  • taking certain blood pressure medications
  • taking steroids
  • taking nonsteroidal anti-inflammatory drugs (NSAIDs)

Other medical conditions or changes in your body can also cause your legs, feet, and ankles to swell. These include:

  • natural changes during a woman’s menstrual cycle
  • pregnancy
  • preeclampsia (a condition during pregnancy that causes high blood pressure)
  • a blood clot of the leg
  • an infection in the leg area
  • venous insufficiency (when the veins are not adequately pumping blood)
  • injury
  • recent pelvic surgery
  • organ failure (particularly in the heart, liver, or kidney)
  • pericarditis (a swelling of the membrane around the heart)
  • lymphedema (a condition that causes blockages in the lymph system)
  • cirrhosis (scarring on the liver)

How Can You Treat Foot, Leg, and Ankle Swelling at Home?

There are several measures you can try at home if your feet, legs, and ankles regularly swell up. These can help relieve swelling when it occurs and possibly help to prevent it.

You should try to elevate your legs whenever you are lying down, to a position above your heart. You may want to place a pillow under your legs to make it more comfortable.

You can also:

  • stay active and focus on exercising the legs
  • try to reduce your salt intake
  • avoid the use of garters
  • maintain a healthy body weight
  • purchase support stockings.
  • choose clothing that fits loosely around your thigh area
  • make an effort to stand up and move around on a regular basis during air travel

When Should You See a Doctor for Your Condition?

While swelling in the lower extremities can simply be the result of standing for too long, it can also be a sign of something more serious. The following information provides some general guidelines about when swelling should be considered a medical emergency, and when it warrants a trip to your doctor.

Emergency Care

If you experience any of the following symptoms along with foot, leg, and ankle swelling, you should go to the nearest emergency room right away:

  • pain, pressure, or tightness in the chest area
  • dizziness
  • confusion
  • feelings of faintness
  • trouble breathing or shortness of breath

Doctor’s Office Visit

If any of the following describe your situation, you should schedule an appointment with your family doctor as soon as possible:

  • you have worsening swelling in addition to heart or kidney disease
  • the swollen areas feel warm to the touch
  • the swollen areas are red in color
  • your body temperature is higher than normal
  • you are currently pregnant and are experiencing swelling that is severe or sudden
  • you have swelling in your legs and also have liver disease
  • you have tried the tips for at-home care, but they have not been successful
  • your swelling is getting worse

What to Expect During Your Doctor’s Visit

During your visit, the doctor will conduct a physical examination and ask you about your symptoms. You should be prepared to explain:

  • where you are noticing the swelling
  • the times of day when the swelling tends to be worse
  • if you are experiencing any other symptoms
  • if you notice any factors that tend to make the swelling better or worse

To help diagnose the cause of the swelling, your doctor may order one or more of the following tests:

  • blood tests
  • X-rays
  • urine tests
  • an ECG to assess heart function

If a health condition is determined to be cause of your swelling, your doctor will first attempt to treat that underlying condition. If the cause of your swelling is non-serious or lifestyle-related, your doctor may recommend some of the lifestyle changes mentioned above. He or she may also probably advise you to reduce your sodium intake.

According to the National Institutes of Health, in some cases, doctors will prescribe diuretics to help reduce swelling. However, these medicines have side effects, and are usually used only if home remedies are not working. (NIH)

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See a list of possible causes in order from the most common to the least.


Ankle Sprain

An ankle sprain happens when the ligaments that connect the leg bones to the foot are injured, often due to accidentally twisting it. Common symptoms include swelling, bruising, and pain.

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Congestive Heart Failure (CHF)

Congestive heart failure is a chronic condition that affects the four chambers of the heart. Early symptoms include fatigue and weight gain. Irregular heart beat and wheezing indicate a worsening.

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Kidney Failure

Kidney failure occurs when the kidneys lose the ability to sufficiently filter waste from the blood. Many factors can interfere with kidney health and function, such as toxic exposure to environmental pollutants an...

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Obesity is defined as having a body mass index (BMI) of 30 or more. BMI is calculated using a person's weight and height. It can lead to other conditions like diabetes, heart disease, and cancer.

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This condition is considered a medical emergency. Urgent care may be required.

A fracture is a broken bone that typically occurs when a bone is impacted by more force or pressure than it can support. In an open fracture, the ends of the broken bone tear the skin.

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What Is Osteoarthritis?

Osteoarthritis (OA) occurs when this cartilage (which provides a cushion for bones) wears away. It can occur in any joint in the body, but most commonly affects the knees, hips, spine, and hands.

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Cirrhosis is severe scarring and poor function of the liver caused by long-term exposure to toxins such as alcohol or viral infections. Certain medications and disorder can also cause cirrhosis.

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Bleeding or spotting, increased need to urinate, tender breasts, fatigue, nausea, and missed period are signs of pregnancy.

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Sprains & Strains

Sprains and strains are injuries to the body, often resulting from physical activity. These injuries are common and can range from minor to severe, depending on the incident. Most don't require medical attention.

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Achilles Tendonitis

Achilles tendonitis occurs when the tendon that attaches the calf muscles to the heel becomes painful or inflamed due to overuse injuries.

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Hypertensive Heart Disease

Hypertensive heart disease refers to heart conditions caused by high blood pressure. It's not a single disease, but rather, a number of different heart disorders all caused by the same thing: the heart working unde...

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Obstructive Uropathy

Obstructive uropathy is a condition in which your urine flow reverses direction. Instead of flowing from the kidneys to the bladder, the urine "refluxes" back into the kidneys. Reflux literally means "a flowing back o...

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Nutritional Deficiencies (Malnutrition)

The recommended daily amount (RDA) of a nutrient is determined by how much the body needs to stay healthy. Nutrients can be obtained in a variety of ways-from eating a varied diet to taking vitamin supplements. ...

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PMS (Premenstrual Syndrome)

Premenstrual syndrome (PMS) is a condition that affects a woman's emotions, physical health, and behavior during certain days of the month generally just before her menstrual period. PMS symptoms start five to 11 day...

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The thyroid gland is an important endocrine gland that controls the body's metabolism. It is a small butterfly-shaped gland located in the front of the neck just below the Adam's apple. The thyroid gland produces th...

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Emphysema is a disease of the lungs. It occurs most often in smokers. It also occurs in people who regularly breathe in irritants.

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Peripheral Vascular Disease

Peripheral vascular diseases (PVDs) are circulation disorders that affect blood vessels outside of the heart and brain. PVD typically strikes the veins and arteries that supply the arms, legs, and organs located belo...

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Deep Vein Thrombosis (DVT)

This condition is considered a medical emergency. Urgent care may be required.

Deep vein thrombosis (DVT) is a serious condition that occurs when a blood clot forms in a vein located deep inside your body. A clot is a clump of blood that has changed from a liquid state to a gelatinous like soli...

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The glomeruli are structures in your kidneys made up of tiny blood vessels. These knots of vessels help filter blood and remove excess fluid. If your glomeruli are damaged, your kidneys will stop longer work properly...

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Chronic Kidney Disease

Chronic kidney disease (CKD) causes destruction of the kidneys. It is progressive and irreversible.Your kidneys are an essential part of your body. They have a number of functions: help maintain the balance of mineral...

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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