Causes of EdemaThe swelling is an accumulation of fluid in the interstitial spaces of the body. The term dropsy or hydrops (as synonymous with edema) indicates the accumulation of serous fluid in a body cavity, usually the peritoneum.
Edema can affect a limited area, such as a leg , or it can be generalized, when it occurs throughout the body. In this case, before edema is clinically evident, must collect several liters of fluid, which is why the weight gain usually precedes other manifestations of edema. When edema of all parts of the body is called anasarca.
Causes of Edema
The localized forms of the limbs are almost always caused by disorders affecting the circulation of venous or lymphatic , such as a thrombosis, venous. Special cases of localized edema are those resulting from trauma as a swollen finger after a crushing, after hitting a bump or swelling in the head after an insect bite .
The forms of generalized edema have as main causes:
heart disease resulting in a failure;
the conditions that lead to a severe renal failure ;
diseases that cause a strong reduction of albumin , such as nephrotic syndrome , severe impairment of hepatic or states of severe food shortages;
The generalized edema is called anasarca. Other cases of edema include malnutrition, edema, myxedema of hypothyroidism and edema in Cushing's syndrome . A special case is the idiopathic edema or edema syndrome , which unlike other generalized edema is not related to diseases or risky situations for the patient.