The bulge between the anus and urethra has no feeling, physiological factors can lead to, pathological factors such as condyloma acuminatum, perianal abscess can lead to. 1. physiological factors: physiological factors are more common, some women of childbearing age between the perineum and the urethra bulge, can isolate the urethra and anus bacteria to avoid infection, there is no abnormal situation. 2. Pathological factors: Pathological factors, first of all, we should observe whether there is local skin damage, such as human papilloma virus infection caused by warts, wart-like cumbersome organisms, after a clear diagnosis can be laser or freezing treatment. Other pathologic factors are, such as perianal abscess is due to bacterial infection caused by suppurative infection of the anal canal and surrounding tissues, the texture is softer, can be formed in the anus and urethra between the local bulge, the abscess is larger can appear fever, fatigue and other symptoms, the need for surgical excision for treatment. Women found between the anus and urethra bulge, there may be other causes, it is recommended to consult the regular hospital anorectal department for diagnosis and treatment.