A lice-killing lotion containing 1% permethrin or a mousse containing pyrethrins and piperonyl butoxide can be used to treat pubic (crab) lice. These products are available over-the-counter without a prescription at a local drug store or pharmacy. These medications are safe and effective when used exactly according to the instructions in the package or on the label. Lindane shampoo is a prescription medication that can kill lice and lice eggs.
Trichomoniasis is another type of vaginal infection. It is caused by a single-celled parasite that is usually spread through sex. In addition to causing bleeding after sex, it can also cause vaginal discharge and itching.
Vaginal Odors After Sex. According to the WebMD, many people have a problem with a foul odor in the vagina after intercourse. This is especially true if your partner ejaculates inside of you. The pH of the semen, along with the extra secretions during sex can create a cocktail of odorous proportions.