Objectives : This study was designed to investigate the chronical features of urticaria and the effects of urticaria treatment with Ko-Bang(古方). Methods : We treated 39 patients for urticaria with Ko-Bang(古方), who visited to care urticaria at the Dept. of Dermatology Oriental medical hospital Dong-eui university from Jan, 2008 to Sep, 2009. This study was assessed using the chart analysis and the follow-up survey by telephone. Results & Conclusions : 1. 39 outpatients were surveyed, who were 20 males and 19 females. And patients who were ages 21-30 were the largest group, 11(28.21%). Among the 39 patients, acute urticaria patients were 8(20.5%), chronic urticaria patients were 31(79.5%), and contraction of a disease period between 6 weeks with 3 months was 17.9%. 2. The causes of urticaria were measured unknown 37.5%, foods 37.5%, drugs 25% in acute and unknown 35.5%, a change of temperature 29%, foods 16% in chronic. And suspected provocation factors were measured unknown and foods each 12 cases. The most of accompanied symptoms was itching sign(34 cases), the second most was self-conscious fever(10 cases). 3. Out of treat prescription(Ko-Bang,古方), Injinho-Tang(茵蔯蒿湯) was used most in 5 cases, Daehwanghwangryunsasim-Tang(大黃黃連瀉心湯), Hwangryun-Tang(黃連湯), Daesiho-Tang(大柴胡湯) were used in each 4 cases, Galgeun-Tang(葛根湯), Chijadaehwangsi-Tang(梔子大黃?湯), Sosiho-Tang(小柴胡湯) were used in each 3 cases, Gaemagakban-Tang(桂麻各半湯), Chijasi-Tang(梔子?湯),Oryeongsan(五笭散) were used in each 2 cases. 4. When the processes of treatment were classified by one poison(一毒), there were the 19 cases (48.7%) which was caused by Bun(煩), the 12 cases(30.8%) by Water(水) and the 4 cases(10.3%) by Gyur(結).