Edema (BE: oedema, formerly known as dropsy) is swelling of any organ or tissue due to accumulation of excess fluid. Edema has many root causes, but its common mechanism is accumulation of fluid into the tissues.
Types of edema are pitting edema and non-pitting edema. The former is present if pressing of the affected body part creates a small pit that disappears within a few seconds. Non-pitting edema is not compressible.
Dropsy of the subcutaneous connective tissue is termed oedema when it is localized and limited in extent; when more diffuse it is termed anasarca; the term oedema is also applied to dropsies of some of the internal organs, notably to that of the lungs.
This may be due to thrombosis of a vein as in phlegmasia dolens (white leg), retardation of venous circulation as in varicose veins, or obstruction of a vein due to the pressure of an aneurism or tumour.
The diseases of the lungs which produce dropsy are those which obstruct the passage of the blood through them, such as emphysema and fibrosis, and thus act precisely like disease of the heart in transferring the blood pressure from the arteries to the veins, inducing dropsy in exactly a similar manner.
Dropsy is swelling from excessive accumulation of serous fluid in tissue.
In post scarlatinal dropsy and in acute febrile dropsy Apis is the remedy when the patient is thirstless; this seems to be characteristic.It is especially adapted to cases depending on kidney disease.
Dropsy from congestion of the kidney, dull aching in renal region and dark, smoky urine.
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