It's normal to experience vaginal odor from time to time. Your body produces a lubricant to help the foreskin retract. Prevent smegma in vulva, oil, and skin cells can remain under the foreskin if the area is not cleaned properly. Microbiology of smegma in boys in Kano, Nigeria. Urethritis is a condition in which the urethra, or the tube that carries urine from the bladder to outside the body, becomes inflamed and irritated. The carcinogenicity of smegma: If no author information is provided, the source prevent smegma in vulva cited instead. Use mild soap and warm water to wash beneath the foreskin or in and around the labia.