A red urticaria wheal (hives) - Image

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A red urticaria wheal (hives)

A red urticaria wheal (hives). A red urticaria wheal (hives). In acute forms of urticaria the aetiology often can be found or at least suspected. In chronic urticaria (lasting for more than 1 month) a specific cause seldom is found.

Picture: Raimo Suhonen


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