Benzocaine cream

Hi,
I have cerebral palsy and use a wheelchair I also have migraine. Most of my migraines start on my forehead. Recently I discovered that putting over the counter, topical benzocaine on the side of my forehead that is hurting helps me a lot. It does take a lot of it though. The tube says it’s designed for boils. I’m also on Relpax but I am happy to have found something that works much faster than 2 hours