Urticaria, also known as rubella, is a localized edematous reaction due to the dilatation of small blood vessels in the mucous membranes of the skin and an increase in the permeability of the walls of these small vessels. The cause of urticaria must be determined as soon as possible, and only when the cause is removed can the symptoms of urticaria be relieved more effectively. Currently found that urticaria occurs due to a number of reasons, as follows: First, food and food additives, the current common stimulating food, including tobacco, alcohol, seafood, such as fish, shrimp, etc.; Second, inhalation factors, such as pollen and willow floss common in the spring; Third, infections, such as bacterial infections may also lead to an acute attack of urticaria; Fourth, medication, some drugs can also lead to urticaria; Fifth, insect bites; Sixth, insect bites; Sixth, insect bites; Fifth, insect bites. Insect bites; six, mental overstress, anxiety and depression. All of the above have a clear relationship with acute attacks of urticaria.