What cause generaluzed edema without renal problem?

Fluid overload: Congestive heart failure tricuspid valve leakage low Albumin venous stasis for lower.

Many causes : Excluding renal problems, generalized edema can be caused by many conditions: congestive heart failure , liver failure[, although that usually spares the arms], lymphedema [lymphema may effect only one to all 4 limbs and the torso] , hypothyroidism , and low protein states including protein malnutrition, and finally venous insufficiency.