I've been using Hair Signals for a few weeks, every other night, and starting today my scalped is sore and itchy.

When I use it I only use about 4 drops for my entire scalp, so I don't think I'm overdoing it. I saw on a few other forums that people were having similar reactions.

I wonder whether I should switch back to Folligen spray, which I never experienced problems with.

Any thoughts?

BTW I also use Folligen shampoo and conditioner every day.

Dilute it with 3 parts water, then apply it.