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.
A hot shower usually leads to excessive drying of the skin. This is one of the major causes of itchy skin after a hot shower. Hard water can leave a fine layer of soap film on your skin which can then trigger the itching sensation. Hard water contains calcium which can make your skin dry and itchy.