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.
Genital itching can be a symptom of many conditions which may include vaginal infections in females or jock itch in males. In either sex, itching may be caused by skin irritation, sexually transmitted diseases, and allergies. In many cases, genital itching that is caused by irritation will clear up on its own if the irritation is removed. Other causes of itching may require more intensive treatment. If you are concerned about genital itching that does not go away, talk to your doctor or another health care professional.