Edema. Symptoms

Definition of edema
Edema has been defined as a pathological state of tissue swelling by the abnormal growth and remarkable interstitial fluid normally filling the interstitial or intercellular spaces of the inner structure of the tissue. So we can say that edema is swelling or thickening of tissues by impregnating abnormal serous fluid.

Why edema occurs?
Any cell or tissue is embedded in a serous fluid or interstitial tissue fluid called lymph tissue that fills the interstitial spaces and cell provides the nutrition that it needs to perform its function.

The nutrients pass from blood capillaries in the blood to the lymph fluid through the capillaries due to their extremely permeable.

When there is a balance between formation and resorption of the lymph fluid, the quantity of it remains normal and steady, so that the interstitial fluid or scarce or abundant. In this way the tissues retain their normal turgor.

When this balance is disrupted and there is an increased formation of lymphatic fluid or interstitial reabsorption remains the same, increases the amount of liquid and produces a state of edema.

Factors that cause edema
In the mechanism of origin of edema into play the following factors:
* The increased pressure difference between the blood contained in the capillaries and interstitial fluid (lymph)
* Changes in physico-chemical constitution of intravascular blood plasma and interstitial fluid of tissues.
* The increased permeability of capillary wall
* Training and accumulation within the tissues of special substances that exert a particular osmotic action causing impaired balance.
* Barriers to reabsorption of interstitial fluid in the local venous and lymphatic vessels.

Symptoms of edema
Symptoms of subcutaneous edema
Subcutaneous edema is understood to be abundant accumulation of interstitial fluid in the subcutaneous tissue, especially when this is very lax. In these cases, the skin overlying the edematous area has the following characteristics:
* Pale
* Tense
* Shining
* The skin retains the imprint of the finger that put pressure on it.

Within the subcutaneous edema recognizes various causes of that are distinguished: cardiac edema, renal edema, inflammatory edema, edema discrásico, etc.. In this article we mentioned the symptoms of cardiac edema and renal edema.

Symptoms of cardiac edema

* The cardiac edema obeys the laws of gravity and, therefore, lies on the dorsum of the feet and around the malleoli (ankle) with advancing cardiac decompensation.
* The edema gradually ascends the legs and finally became widespread throughout the body.
* It is aggravated by the prolonged presence of skin
* Is reduced in mild cases with rest.
* The skin of the zone with edema has a slightly pale purple striae caused by local venous blood retention.

Symptoms of renal edema
This type of edema be produced, usually in cases of nephritis and nephrosis.
* This is not related renal edema, or does not obey the force of gravity as in the case of cardiac edema.
* It is located mainly in body regions that have the subcutaneous tissue with looser meshes: eyelids, face, inner thighs, prepuce and scrotum (in men), large labia (in women)
* The skin is pale, taut and shiny
* It stretches very easily.

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*Automatic Translation