If the osmotic pressure on the venous side of capillary beds is lower than the hydrostatic pressure, then the fluid will tend to accumulate in tissues.
When there is accumulation of fluid in tissues it will lead an acute condition called as an Oedema.
Oedema is the swelling which is caused by the trapped fluid which has now leaked into the tissues. This is an acute condition.
oedema is also known as Swelling.
Oedema happens because there is no osmotic pressure which can take the extra fluid into the tissues, and leaves the fluid into the capillary bed.
Redness and tenderness is seen in such cases.
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