How is urticaria caused?

Urticaria is a common skin disease. Temporary inflammatory hyperemia and massive fluid exudation are caused by many factors. Causing local edema damage. It appears and quickly subsides, accompanied by severe itching. The common causes of urticaria are: 1. Fish, shrimp, crab and eggs are the most common foods. Secondly, some spices and condiments can also cause 2. Drugs. Infection 4. Animal and plant factors, such as insect bites or inhalation of pollen and feathers. 5. Physical factors, such as cold and heat, sunshine, friction, pressure, etc., may be caused. Therapically; Antihistamines are important drugs for the treatment of various urticaria patients, which can control the symptoms of most patients, such as; Chlorpheniramine, Mindy, etc. Antihistamines have various side effects, especially for workers and drivers working at high altitude, which can easily lead to accidents due to drowsiness. What are the taboos in daily life? 1. Don't scratch. 2. Don't apply hot compress. 3. Avoid eating foods containing artificial additives and eat more fresh fruits and vegetables. Fried, fried or spicy foods are unlikely to cause thermal reactions in the body.