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.
Like itching in other areas, vaginal itching is often the result of exposure to an irritant. In this case, any soap or chemical product you use on your vagina or vulva â or on clothing that touches the area â can cause irritation. Sometimes the culprit is something obvious, like a new lubricant or spermicide. Other times the itching is actually the result of the detergent or fabric softener used on clothing. Even douche, which is actually used to cleanse the vagina, can cause irritation for some women.