head lice
"My head was itching like crazy and I had a huge red rash on the back of my head so I went to the dermatologist to find out the source. Turns out I had head lice and a really bad case of it too! My derm. recommended OVIDE, and I applied it the second I got home. Within 5 minutes of applying it there were almost 20 louse bugs lying on my bathroom counter-dead. The smell was so strong i threw up (I also hadn't eaten all day) but was totally worth it :))"