What is Urticaria (Hives)?
Urticaria, an extremely common allergic problem, causes temporary skin rashes that irritate the skin's surface.These rashes, which appear as raised bumps on the skin's surface, are red around the edges and pale in the center, and cause itching. Urticaria starts suddenly; the bumps disappear after a few hours and reappear in another part of the body.
Nearly half of urticaria cases occur in mucosal or submucosal tissues of the body. This special type of dermatological disease is called angioedema. It can be seen in the genital areas or respiratory tract. Like urticaria, it disappears within 24 hours and reappears in other parts of the body. However, unlike hives, angioedema bumps are pink and do not cause itching. Angioedema in the respiratory tract can lead to breathing difficulties; therefore, immediate medical attention is required when attacks occur.
Acute urticaria lesions, which can be seen at any age, usually disappear within a day. Chronic urticaria, more common in adults, is active for at least 6 weeks. It sometimes appears with intervals of a few days. If the lesions are severe and affect the deeper layers of the skin, angioedema can occur.
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