Understanding Hereditary Angioedema

The more you know about hereditary angioedema (HAE) the better equipped you will be to treat and help manage an HAE attack.

What is HAE?

HAE is a hereditary disease that can cause substantial swelling in specific parts of the body, including the abdomen and face. Learn about the three different types of HAE.

What causes HAE?

HAE is caused by the poor functioning or lack of a protein called C1 esterase inhibitor (C1-INH). Find out more about HAE and your family tree.

Checking your symptoms

The symptoms of HAE are similar to those of other conditions. But there are clues to help you identify this rare disease.

Recognizing the onset of HAE attacks

Most people with HAE report that an attack begins with warning signs. Learn to recognize yours so you can take appropriate steps before dangerous swelling occurs.

Understanding HAE video

View a video that presents what experts have learned about HAE, and why it is often misdiagnosed.