Edema is swelling caused by excess fluid trapped in your body's tissues. Although edema can affect any part of your body, you may notice it more in your hands, arms, feet, ankles and legs.
Edema can be the result of medication, pregnancy or an underlying disease — often congestive heart failure, kidney disease or cirrhosis of the liver.
Taking medication to remove excess fluid and reducing the amount of salt in your food often relieves edema. When edema is a sign of an underlying disease, the disease itself requires separate treatment.
Symptoms:
• Swelling or puffiness of the tissue directly under your skin, especially in your legs or arms
• Stretched or shiny skin
• Skin that retains a dimple (pits), after being pressed for several seconds
• Increased abdominal size
Courtesy: Mayo Clinic
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