Please help me, my heart cath, lung x-ray, thyroid, liver test & kidney biopsy are all normal but i still have severe edema in my whole body. why? why me?

Unclear. : Without the benefit of a formal history and exam, it is difficult to answer your question. Sounds like you've had an appropriate evaluation so far, and ruling out heart, liver, and kidney disorders should be somewhat comforting. Make sure your nutritional status is checked and ask your doctors if there are any reasons to suspect blood clots. Good luck!

Seek rare causes: Causes of generalized edema that may be missed on first screen include conn's (rarely causes edema), allergy to a rx (some antihypertensives, nsaids), early diabetes (leaky vessels) or scleroderma, esterase deficiency (unusual), mastocytosis, or even poorly-understood effects from diuretics. A nephrology consult in particular may help. Be brave and we'll figure this out.