The swelling in response to water retention by the body

We see touch swelling usually both lower limbs as a result of water retention by the body. These swellings are usually painless when not too important, and have the particularity to keep the footprint pressure of the fingers when the emphasis a bit. They say they take the cup and we talk edema.
In practice, these edemas were mainly in the dependent parts, ie the lower body. If the person is bedridden, it will be back. If she is sitting or walking, it will be the members.
The three major causes of edema are kidney failure, heart failure, liver cirrhosis and malnutrition.

Renal failure may have multiple origins, it may be the result of poorly controlled diabetes, an EVA, a state of shock, microbial infection of the kidneys, a disease known as self- immune, the governing body of the antibodies against kidney and destruction. It’s sometimes difficult medical diagnosis. Some are reversible renal failure. In practice, when the kidneys are functioning poorly, they eliminate a lot of sodium chloride (salt). The salt remains in the body, retaining water molecules with him: That is too full of water that swells the legs and stomach and sometimes fills the lungs.

Heart failure occurs most often in people who have known heart disease. It is then usually called a comprehensive heart failure, ie touching hearts right and left. It may occur sometimes more insidious in a person being or having pulmonary embolism, or in severe respiratory failure. This is called heart failure right.
In practice, these heart failure makes it hard for kidney perfusion. This poor renal perfusion creates a pseudo-kidney, so-called renal functional, responsible for water retention and edema. A hormone, aldosterone, its secretion increases seen in these cases of heart failure. She has the distinction of retaining water and exacerbate the situation.

Liver cirrhosis is a destruction of the liver characterized by hardening. The portion of blood is so hard through the liver. There is much slower venous flow in the liver and kidney that appears to be heart failure, renal function and edema. Again the hormone aldosterone exacerbates the situation.
Swollen feet causes.
Malnutrition is also a cause of edema. This problem is rather a problem of the Third World, but is seen in the terminal stages of illness and in end-stage liver failure.
The agency is supposed to occur through the liver proteins. For this, he needs a diet sufficient and liver effectively. These proteins have the ability to retain water in the blood and prevent them from fleeing to the tissues (referred to as osmotic pressure).
When these proteins are missing, the water escapes into the tissues and causes swelling.