As an allergist/immunologist, I am frequently asked to see patients with angioedema or swelling. Although many times the source of angioedema is due to exposure to a protein (antigen) to which that person is allergic, in some cases this is not true. One such instance is with Hereditary Angioedema or HAE.
HAE presents with episodes of swelling, usually of the extremities, face, trunk, genitals or swelling of the abdomen which can produce severe abdominal pain, nausea and vomiting. In some...
