What is Hereditary Angioedema (HAE)?
Hereditary Angioedema (HAE) is a very rare, potentially life threatening genetic condition that causes episodes of swelling (edema) and fluid retention in various body parts, including the hands, feet, face, and airway. Only about 1 in 50,000 to 150,000 people has HAE. People suffering from HAE have a low level or decreased function of an important protein in their blood. The protein is called C1 esterase inhibitor (C1-INH). C1-INH regulates and “turns off” various reactions in the body.
