The abnormal buildup of fluid in the body is called edema. Edema is commonly seen in the feet and ankles, because of the effect of gravity, swelling is particularly noticeable in these locations. Common causes of edema are prolonged standing, prolonged sitting, pregnancy, being overweight, and increase in age.

Mild ankle swelling is very common and usually harmless. However, it's important to understand what can cause swollen ankles so you can seek urgent treatment if necessary. These are the eight most common swollen ankles causes: Standing or walking for extended periods of time.

Swelling in the Legs, Ankles, or Feet Swelling (edema) in your lower legs is another sign of a heart problem. When your heart doesn't work as well, blood flow slows and backs up in the veins in your legs. This causes fluid to build up in your tissues.

If your swelling is accompanied by other symptoms, including fatigue, loss of appetite, and weight gain, see your doctor right away. If you feel short of breath or have chest pain, pressure, or tightness, call 911.

Swelling in the Legs, Ankles, or Feet Swelling (edema) in your lower legs is another sign of a heart problem. When your heart doesn't work as well, blood flow slows and backs up in the veins in your legs. This causes fluid to build up in your tissues.

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.

7 Helpful Ways to Reduce Swollen Feet and Ankles

1. Walk it Out.
2. Drink Lots of Water.
3. Sleep on Your Side.
4. Enjoy Some Pool Time.
5. Limit Your Salt.
6. Wear Compression Socks.
7. Elevate Your Feet.

Some people may feel fine when they get up in the morning. But by the end of the day, their lower legs, ankles and feet become swollen. If the swelling is in only one leg, that may suggest a blood clot or infection. When it's related to heart failure, the swelling generally occurs in both legs.

Home Care

• Put your legs on pillows to raise them above your heart while lying down.
• Exercise your legs.
• 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.

Some people may feel fine when they get up in the morning. But by the end of the day, their lower legs, ankles and feet become swollen. If the swelling is in only one leg, that may suggest a blood clot or infection. When it's related to heart failure, the swelling generally occurs in both legs.

You can use ice packs, cold therapy systems, ice baths, or cryotherapy chambers to deliver cold to the affected area. Apply cold several times a day for 20-30 minutes at a time to help keep swelling down, especially in the first several days after an injury.

One important thing to keep in mind is that ankle swelling can last 2-3 months after the injury, even if the pain has completely gone away. Compression socks can alleviate the swelling, but time is the best medicine. More severe ankle sprains may require additional treatment.