IgG food hypersensitivity: A potential hidden precipitant for chronic spontaneous urticaria A case report.

Background: While the link between foods and chronic spontaneous urticaria (CSU) is controversial, many immunological mechanisms have been proposed to establish a causal relationship.

Objective: To explore the potential benefit of avoiding immunoglobulin G (IgG)-mediated food hypersensitivity as a triggering factor in a case with CSU.

History: The patient is a 50-year-old woman who complained of CSU for 1 and half year, which responded partially and temporarily to antihistamine medications.