A lump on the outside of the urethra in women may be caused by folliculitis, warts and sebaceous cysts. 1. Folliculitis: Folliculitis may be triggered by urethral infections, which may cause rashes, itching and other symptoms, as well as the appearance of small particles in the urethra with pain. 2. Condyloma acuminatum: may be due to sexual intercourse or other ways of infection, in the anus, vagina, the edge of the urethra appeared small particles of superfluous organisms, and sometimes may cause the surface ulceration. 3. Sebaceous cysts: generally speaking, the cysts are only the size of a soybean, but they may also be as big as a small date. If there is no inflammation, there can be no symptoms, but if there is inflammation, the patient will not only feel the pain, but also emit a strange odor. There may be other reasons for a pimple on the outside of the female urethra, and it is recommended that the patient should go to the hospital in time to have a consultation, after clarifying the cause of the disease, and then under the guidance of the doctor to carry out the treatment. Usually should pay attention to keep the perineum clean and hygienic, standardize sexual life, change underwear and so on.