DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Urticaria in respiratory infection. Close-up of an urticaria (hives) rash on a 20-year-old male patient with a viral upper respiratory tract infection (URTI). Urticaria is a skin condition in which a rash of itchy wheals or lumps develops on the skin. It most often occurs as an acute allergic response but can also result from heat, cold, sunlight or, less frequently, other medical conditions like cancer.
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