I have an itchy scalp too but i know it's because of the VO5 shampoo i'm using. I am too stingy to waste it though LOL. I love the Original Mint Source stuff but only buy it when it's on offer.
My hair hates me for having my baby, it's done nothing but fall out snce she was born. As if my hair wasn't thin enough
It could just be that your skin is dry on your head though.