How does whole body urticaria itch to do

Urticaria, commonly known as rubella, is a localized edematous reaction due to reactive expansion and increased permeability of small blood vessels in the skin and mucosa. Most patients cannot find the exact cause, especially chronic urticaria. Common causes include food, drugs, infections, physical factors, animal and plant factors, mental factors, visceral and systemic diseases. Other factors such as inhalation pregnancy or menstrual cycle can cause this disease. According to the severity of symptoms, if only skin manifestations are present, Antihistamine preparations can be used, commonly used drugs such as chlorpheniramine, loratadine, cetirizine, etc. If the condition is serious with shock, laryngeal edema and breathing difficulties should be rescued immediately.