What Causes Edema?
Possible Causes of Edema
Standing or sitting for long periods of time particularly in hot weather can cause excess fluid to accumulate in feet, ankles and lower legs.
Eating food with a high salt content.
Being largely overweight or obese. Excess weight can put added pressure on the knee and ankle joints and the lower limbs.
Congestive heart failure is a condition in which the heart can no longer pump efficiently, and causes fluid buildup in the lungs and other parts of the body. Swelling is often most visible in the feet and ankles.
High blood pressure, liver, kidney and thyroid diseases can cause edema
Severe chronic (long-term) lung diseases, including emphysema and chronic bronchitis, increase pressure in the blood vessels that lead from the heart to the lungs. This pressure backs up in the heart and the higher pressure causes swelling in the legs and feet.
Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency. This makes it more difficult for the veins to pump blood back to the heart, and leads to varicose veins and a buildup of fluid.
Pregnancy can cause edema in the legs as the uterus puts pressure on the vena cava, a major blood vessel that returns blood to the heart from the legs, and progesterone relaxes the walls of the blood vessels. Fluid retention during pregnancy also can be caused by a more serious condition called pre-eclampsia.
Low protein levels in the blood caused by malnutrition, kidney and liver disease can also cause edema. The proteins help to hold water inside the blood vessels so fluid does not leak out into the tissues. If a blood protein, called albumin, gets too low, fluid leaks out the blood vessels and edema occurs, especially in the feet, ankles and lower legs.
Tags: Edema, Edema causes
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