A Rare Cause of Physical Urticaria: Cold Urticaria

Cold urticaria is characterized by the development of urticaria and/or angioedema after cold exposure. Cold drinks, cold air and cold objects are triggering factors of cold urticaria. Extensive cold contact of large areas of skin may lead to systemic reaction. The 12-year-old male patient who was followed up with a diagnosis of hypereosinophilic syndrome and hypothyroidism presented to our outpatient clinic with complaints of swelling, erythema and pruritus after exposure to cold. The patient’s face, hands and feet had developed swelling, erythema and pruritus after exposure to snow, after he entered cold water, and in cold air, for the last six months. Hepatitis markers and cryoglobulin were negative. An ice cube test was performed and found positive. This case is presented to remind cold urticaria, a rare type of physical urticaria.