The present invention relates to a composition applied to female pudendum, comprising a lactic acid ferment solution. The lactic acid ferment solution is obtained by inoculating the strain of a lactobacillus into a type of milk and fermenting and cultivating under 30 to 45 DEG C. The composition can lower the pH value in the vagina, so that the microbial community of vagina can maintain normal without resulting drug resistance.本發明係關於一種應用於女性陰部的組合物,其包含一乳酸菌發酵液,該乳酸菌發酵液係藉由將一乳酸桿菌屬(Lactobacillus)的菌株接種於一奶類中,並在30~45℃下發酵培養而得。該組合物可降低陰道pH值,使陰道菌相維持正常且不會產生抗藥性。