What about chronic cold urticaria?

Cold urticaria can occur at any age. It is more common when exposed to cold water or cold places. It shows localized itching, edema, and wheals within minutes. It is more common on the face and hands. Severe urticaria can also accumulate elsewhere on the body. When swimming in cold water or showering in rain, it may show allergic symptoms such as headache, skin flushing, hypotension, and even anaphylactic shock. For severe symptoms, oral antihistamines are recommended for treatment, and oral hormones can also be used for shock symptoms. Of course, in daily life, local warmth should be paid attention to to prevent contact with cold allergens.