Itchy Scalp?

[JMay83]

Hey guys. I was just wondering if someone could maybe help me with a problem I've been having lately. I've noticed lately that my scalp has been itching like crazy. I thought maybe it was because if I didn't wash my hair daily that i had a lot sebum build up, and maybe that was causing the itch.. So I started shampooing every day, but this didn't help. I've tried Nizoral, Selsun Blue, and Neutrogena, and none of them has relieved the itching. Every once in a while I'll get a pimple on my scalp that itches, and when I take a shower and run hot water over my scalp, it relieves the itching all over my scalp. I'm making an appointment with my doctor this week to see what the deal is. Anyone else experience something along these lines? Thanks !