I've suffered with this for ages. I started using peppermint oil (by accident!!) and omg!!!! It works!!!! No carrier oils, straight peppermint oil on my arm and it hasn't woken me up, hasn't driven me crazy. I only use it before bed, and rub it into my arm, which could start an itch attack, but in 30 seconds feels amazing. It actually works so well I forget about it. And I've had a "normal itch" on that arm. Amazed. Complete accident.