We describe an interesting coincidence in which a woman developed acquired idiopathic cold urticaria and her husband systemic cold urticaria eight months later. The occurrence of cold urticaria in a tropical country like Singapore is rare. Each case illustrates the typical features of that particular type of cold urticaria, including the appropriate response to the challenge test and its self-limited nature.
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Declaration
The author(s) declare there are no affiliations with or involvement in any organisation or entity with any financial interest in the subject matter or materials discussed in this manuscript.
