I had Botox 6 weeks ago, 10 units between the brow and after a week developed bad hives and rash all over my face. My face burns and is very red. I've also developed pimples. Has anyone else experienced any of this and if so, how long did it take for their allergic reaction to pass? I'm a bit scared it's here to stay for the 6 months that the Botox is in my system. Hopefully not longer! Any ideas on how to get botox out of your system quicker?