In order to further improve the diagnosis and treatment level of type 2 inflammatory skin diseases, the National Clinical Center for Skin and Immune Diseases established a standardized diagnosis and treatment center for type 2 inflammatory skin diseases to systematically and effectively understand the current treatment status of patients with type 2 inflammatory skin diseases, as well as the efficacy and safety of various treatment methods during practices, so as to further improve the diagnosis and treatment level of type 2 inflammatory skin diseases and help patients with type 2 inflammatory skin diseases.

Inclusion Criteria:

1. Patients from the medical units that has passed the data review of the National Clinical Center for Skin and Immune Diseases (see the study sites for data collection for details);
2. patients diagnosed with type 2 inflammatory skin diseases (dermatitis/eczema, urticaria, pemphigoid, prurigo nodularis).

Exclusion Criteria:

1. patients who fail to provide informed consent form;
2. patients who cannot complete the questionnaire independently or under the guidance of investigators

Patients with Type 2 skin disease. Estimated number of patients: 100,000 (No age limit)