I had a hysterectamy 6 weeks ago. And since then I have been having random swelling. The swelling started two weeks after the surgery. It started with my arms swelling and my legs. then it would go away. now my eye was swollen on saturday night and sunday. It went down by monday morning. Yesterday, my chin was swollen and now this morning it has moved up to my lips and the side of my face feels numb. what could be the cause of this?