It can be due to severe anemia, a failing heart, serious kidney disease, liver failure, electrolyte imbalance, polycystic ovary,
low protein in the blood, and disorders of adrenal gland. This is something for which you must consult a doctor ASAP, preferably an internal medicine specialist.
The swelling could be causing pressure on the nerves and hence numbness and tingling. The pressure can be at carpal tunnel or at the elbow. Maybe treating the edema will take care of this.