A Study to Explore Hereditary Angioedema (HAE) Symptoms and Treatment Patterns in Korean People

This study intends to gather information on HAE attack symptoms, how often the attacks occur, and the number of times treatment is required to manage the attacks in Korean people over a period of up to 11 months. The main aims of this study are the following: * To describe the patterns of HAE attacks, including how often they occur, where they happen in the body, how severe they are, the time between attacks, and any warning signs that appear before an attack. * To assess how HAE is treated, particularly looking at how on-demand treatments are used during HAE attacks. * To learn about the people who suffer from HAE attacks (e.g. age, gender, for how long they have been suffering from HAE, and if they use danazol to manage HAE). In this study, already existing data will be collected and reviewed from a mobile application called "MyHAE Story". The study will only review data collected as part of the clinical routine practice. The study will not impact the standard medical care and treatment of participants.