Foot, leg, and ankle swelling is common when the person also:
- Is overweight
- Has a blood clot in the leg
- Is older
- Has a leg infection
- Has veins in the legs that cannot properly pump blood back to the heart
Injury or surgery involving the leg, ankle, or foot can also cause swelling. Swelling may also occur after pelvic surgery, especially for cancer.
Long airplane flights or car rides, as well as standing for long periods of time, often lead to some swelling in the feet and ankles.
Swelling may occur in women who take estrogen, or during parts of the menstrual cycle. Most women have some swelling during pregnancy. More severe swelling during pregnancy may be a sign of preeclampsia, a serious condition that includes high blood pressure and swelling.
Certain medicines may also cause your legs to swell. Some of these are:
- Antidepressants, including MAO inhibitors and tricyclics
- Blood pressure medicines called calcium channel blockers
- Hormones, such as estrogen (in birth control pills or hormone replacement therapy) and testosterone
Painless swelling may affect both legs and may include the calves or even the thighs. The effect of gravity makes the swelling most noticeable in the lower part of the body.
Painless swelling of the feet and ankles is a common problem, especially among older people.
Abnormal buildup of fluid in the ankles, feet, and legs can cause swelling. This fluid buildup and swelling is called edema.
Some tips that may help reduce swelling:
- Put your legs on pillows to raise them above your heart while lying down.
- Exercise your legs. This helps pump fluid from your legs back to your heart.
- Follow a low-salt diet, which may reduce fluid buildup and swelling.
- Wear support stockings (sold at most drugstores and medical supply stores).
- When traveling, take breaks often to stand up and move around.
- Avoid wearing tight clothing or garters around your thighs.
- Lose weight if you need to.
Never stop taking any medicines you think may be causing swelling without first talking to your health care provider.
What to Expect at Your Office Visit
Your provider will take a medical history and do a thorough physical examination, paying special attention to your heart, lungs, abdomen, lymph nodes, legs, and feet.
Your provider will ask questions like the following:
- What body parts swell? Your ankles, feet, legs? Above the knee or below?
- Do you have swelling at all times or is it worse in the morning or evening?
- What makes your swelling better?
- What makes your swelling worse?
- Does the swelling get better when you raise your legs?
- Have you had blood clots in your legs or lungs?
- Have you had varicose veins?
- What other symptoms do you have?
Diagnostic tests that may be done include:
- Blood tests such as a CBC or blood chemistry
- Chest x-ray or extremity x-ray
- Doppler ultrasound examination of your leg veins
Your treatment will focus on the cause of the swelling. Your provider may prescribe diuretics to reduce the swelling, but these can have side effects. Home treatment for leg swelling that is not related to a serious medical condition should be tried before drug therapy.
When to Contact a Medical Professional
Call 911 if:
- You feel short of breath.
- You have chest pain, especially if it feels like pressure or tightness.
Call your provider right away if:
- You have heart disease or kidney disease and the swelling gets worse.
- You have a history of liver disease and now have swelling in your legs or abdomen.
- Your swollen foot or leg is red or warm to the touch.
- You have a fever.
- You are pregnant and have more than just mild swelling or have a sudden increase in swelling.
Also call your provider if self-care measures do not help or swelling gets worse.
Goldman L. Approach to the patient with possible cardiovascular disease. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 51.
Seller RH, Symons AB. Swelling of the legs. In: Seller RH, Symons AB, eds. Differential Diagnosis of Common Complaints. 6th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 31.
Trayes KP, Studdiford JS, Pickle S, Tully AS. Edema: diagnosis and management. Am Fam Physician. 2013;88(2):102-110. PMID: 23939641