Objectives : The purpose of This study was to find the effect of Jeondo-gan (JDS) on acne. Methods : From December 1, 2003 to January 31, 2004, 11 patients with acne were observed, limited to patients who were teated with JDS for more than three weeks. JDS mined with cold water was used on outbreaks of acne, 15 minutes. 1 time per night, 6 times per week. Results & Conclusions : 3 males and 8 females were treated ever three weeks, The average age was 21.73 years old. Before treatment, ache patients had sparse papules on the forehead. both cheeks, and chin, After treatment over three weeks, nine acne patients changed for ihe better at a rate of $81.8\%$ (mild improved $54.6\%$, improved $18.2\%$, much improved $9\%$)