Chronic spontaneous urticaria (CSU) (also referred to as "chronic idiopathic urticaria") represents the majority of cases of chronic urticaria. CSU is defined as chronic urticaria of known or unknown etiology lasting for ≥ 6 weeks. In a subset of patients with CSU, there is an identifiable underlying autoimmune etiology (chronic autoimmune urticaria).
CSU can be challenging to manage and often has a significant negative impact on patients' quality of life (eg, distress, frustration, anxiety, sleep issues). A detailed history and physical exam, appropriate clinical testing, and risk awareness are pivotal to identify patients with CSU and initiate treatment.
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Cite this: William D. James. Fast Five Quiz: Chronic Spontaneous Urticaria - Medscape - Jun 15, 2020.