Quick Facts
What are hereditary and acquired angioedema?
Angioedema is swelling of your face, lips, tongue, and throat that is usually caused by an allergic reaction. But angioedema can also be caused by a certain problem with your immune system.
Hereditary and acquired angioedema are like angioedema caused by an allergic reaction, but they don't itch and you don't get hives (red, itchy, raised patches on the skin).
What causes hereditary or acquired angioedema?
Hereditary angioedema is genetic (a trait inherited from a parent). The condition is present at birth, but symptoms usually start when you’re a child or teenager.
Acquired angioedema can develop after you get certain cancers or autoimmune diseases (a disease that causes your body's immune system to attack its own tissues). Symptoms usually start later in life.
