GENERAL HISTOLOGY

Detailed explanation-1: -Urticaria – also known as hives, weals, welts or nettle rash – is a raised, itchy rash that appears on the skin. It may appear on one part of the body or be spread across large areas. The rash is usually very itchy and ranges in size from a few millimetres to the size of a hand.

Detailed explanation-2: -Urticaria on its own is not a serious condition. However, urticaria can occur in a severe allergic reaction called anaphylaxis (see below). If you have symptoms of anaphylaxis this is a medical emergency. Call 999 immediately and ask for an ambulance if you or someone else is experiencing anaphylaxis.

Detailed explanation-3: -Hives, also called urticaria, causes itchy welts that may be triggered by foods, medications or other substances. Changes in color of the affected area might be less visible on brown or Black skin. Hives-also called urticaria (ur-tih-KAR-e-uh)-is a skin reaction that causes itchy welts.

Detailed explanation-4: -Acute hives-Most cases of hives are acute and will not last beyond a few days to one week or two. Triggers of acute hives can include the following: Infections – Infections can cause hives in some people. In fact, viral infections cause more than 80 percent of all cases of acute hives in children.