Study of 135 patients with chronic urticaria who were examined and treated in No.103 Hospital, from August, 2012 to July, 2013, the results showed that: The percentage of the patients wi~h chronic urticaria from 20-49 years old was 66.6 percent. The rate of males and females was equal. Personal allergic history was: 94.1 percent. Chronic urticaria occur all: year round. The percentage of the patients with chrcmic urticaria in the summer was the highest (37 percent). Most of the patients suffer from Chronic urticaria within a year ( 69,6 percent). The rate of patients who were ill over 5 years was 11,1 percent. The level of severity disease was 65,9 percent, moderate: 31,9 percent and lighter was 2.2 percent. There were 14 favorable factors to occurrence of. the disease. The percentage of the climatic factor was the highest: 60.7 percent. There were 34.8 percent cases no find relevant factors.