The study has been designed as a French, multicentric survey study to obtain data to describe the burden of on-demand treatment for patients with hereditary angioedema (HAE). The online survey assesses various aspects of HAE and in particular the burden of HAE from the patients' and caregivers' perspectives.

The study has been designed as a French, multicentric survey study to obtain data to describe the burden of on-demand treatment for patients with hereditary angioedema (HAE). The study will also explore the burden related to the administration of intravenous or subcutaneous on-demand treatments. The study was designed to collect data concerning the burden of HAE in patients with HAE (during HAE attacks and between attacks) and in caregivers. The online survey will collect data to describe the characteristics of patients with HAE, the disease characteristics, details concern various aspects of HAE attacks, and the burden of HAE in patients and their caregivers.

Inclusion Criteria:

For the patient population:

1. Patients with a confirmed diagnosis of HAE with a deficit in the C1 inhibitor.
2. Aged ≥12 years
3. Having consulted for HAE in the last 3 months and with a medical file.

For the caregiver population:

1. A person identified by the patient as part of their support group and who provides support with the management of the patients HAE (including family members, friends, spouse, etc.)

Exclusion Criteria:

For the patient population:

1. Opposes to participating in the study.
2. Patients is under guardianship or deprived of their liberty.

All patients, irrespective of their gender are eligible for the study.

Patients with HAE

Upon reasonable request.