Hi. My husband is 30. From past 2 months he is having sudden swelling on face it was 2 times in lower lip, 1 time in upper lip and today on left eye. There is no pain or itching. Just swelling. We can not comprehend as to why this swelling is happening. We can not relate it to any food allergy either. What should we do? Please tell what could it possibly be and what specialist should we consult? Also is there any tests which can help us knowing what is going on. Thanks in advance.