Edema is the swelling caused by fluid in your body's tissues. It usually occurs in the feet, ankles and legs, but it can involve your entire body.

To keep swelling down, you may be recommended to keep your legs raised when sitting, wear support stockings, limit how much salt you eat or take a medicine called a diuretic, also called a water pill.

Causes of edema include:

  • Eating too much salt
  • Sunburn
  • Heart failure
  • Kidney disease
  • Liver problems from cirrhosis
  • Pregnancy
  • Problems with lymph nodes, especially after mastectomy
  • Some medicines
  • Standing or walking a lot when the weather is warm 
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