Abstract: ObjectiveTo understand the way ofmedicalcare seeking of sexually transmitted infection(STIs) patients among female sexual workers(FSWs) in Yunnan for promoting FSWs to get correct way to see a doctor.MethodsFemales engaged in commercial sexual service were selected as subjects and interviewed face to face with constructed questionnaire to collect the infounanon of medical care seeking in recent one year.ResultsAmong 798 STIs identified, 43.0% of the patients bought medicine by themselves; 24.9% went to general hospital and 17.9% selected private clinic There were significant differences in ratios of selecting general hospital between different groups of ages(χ²=11.419, P=0.010),place of sexual service(χ²=6.007, P=0.050),residence area(χ²=4.810, P=0.028) and race (χ²=4.296, P=0.038).ConclusionMost of FSWs with STIs had incorrect medical care seeking behavior and lacked of knowledge about correct medical care seeking The administmtion should adopt strict rule of medicine prescription in drugstore and private clinic.