GENERAL HISTOLOGY

Detailed explanation-1: -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-2: -Hives that last longer than six weeks or with recurring outbreaks over a six-week period are most commonly caused by viral or bacterial infections like Helicobacter pylori (bacteria in the stomach), hepatitis or a dental infection. Autoimmune diseases like lupus and Hashimoto disease can also cause hives.

Detailed explanation-3: -Hives, or urticaria, is a kind of rash. It may result from an allergy, another trigger such as adrenalin, an underlying health condition, or other factors. Acute hives starts suddenly and resolves within 6 weeks, while chronic hives can last for months or years.

Detailed explanation-4: -Symptoms of hives may include any of the following: Itching. Swelling of the surface of the skin into red-or skin-colored welts (called wheals) with clearly defined edges. Wheals may get bigger, spread, and join together to form larger areas of flat, raised skin.