An association with bradykinin has been proposed in the case of hereditary angioedema.

Presentation

The rings are barely raised and are non-itchy. The face is generally spared.

The condition is characterised by circular, non-pruritic, erythematous rashes that form on the trunk and extremities of the body. The rash has a known serpiginous edge, and often appears and disappears spontaneously over time. Histological

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