Angioedema does not respond to antihistamines.
It is however connected to an acquired type which may accompany lymphoproliferative disorders. If you have a lymphoma, or low grade leukemia, the angioedema comes from disruption of C-1 inhibitor.
http://en.wikipedia.org/wiki/Angioedema
Angioedema does not always have hives. Just the swelling and some redness, and pain/discomfort.
This condition is difficult to diagnose. There are special blood tests for it requiring expert evaluation. It is a relatively new medical problem, that has just been elucidated. So many doctors are not familiar with it.
This is a link for doctors, but it is very understandable to patients:
http://www.hcplive.com/publications/...-04/2005-04_02
You could have the acquired type, due to your medical history, or the emergence of a new cancer of the lymphatic system or blood.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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