When body liquid redundantly accumulates in intercellular space of subcutaneous tissue and soft tissues, the clinical condition will display edema which presents obvious hollow when the part with less subcutaneous tissue is pressed.
Edema is a common symptoms of pathological process, the body liquid of which
comes from plasma and has almost the same proportion of sodium and water with
Generally, excessive body liquid's accumulating in coelom is called hydrops
such as hydrothorax, Celiac hydrops and hydrocardia, etc. Generally speaking,
edema is usually a sign of disease which often can lead to edema. But not all of
edema means nephritis and edema is not the specific characteristic of kidney
disease, which can be caused by other reasons such as cardiac edema, hepatic
edema, nutritional edema, medical edema and idiopathic edema, etc.
Apart from that, for some people they can have edema of part or all over the
body with no abnormality found out. This is because that some edema occurs
without disease and it is the result of the body's accommodation to its status,
internal and external environment, which is clinically called functional
There are some details for different kinds of edema as follows:
One, edema occurs during traveling. Edema occurs during a long trip or long
time of walk, which is caused by the increased filtration pressure of acral
capillary when the limbs under the knees stand for a long time and the return of
blood in vein suffocates as a result of gravity.
Two, edema caused by high temperature. It is more common to woman in clinic.
This kind of edema often occurs in summer or hot environment and can repeat for
many years, which often appears on hands,feet with slight hollow and accompanys
weakness and anorexia. Besides, edema can automatically disappear after summer
or when leaving hot environment.
Three, edema caused by insomnia. People who can not fall asleep for a long
time in night will have edema on face, eyelids and hands, etc when they get up
next morning. But this kind of edema can automatically disappear after
Four, edema when people get up in the morning. When people are asleep, the
movement of eyelids will reduce,the blood will flow slowly and the liquid in
blood will enter into the loosen tissue of eyelid, which will lead to edema.
Edema can be caused by many factors of physiology or pathology, people should
carefully check whether there is some other abnormality nor not and do some
tests to find out the real reason.
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