You didn't say what you're cleansing your scalp with. It is possible to get product buildup on your scalp. I'm not sure oiling is a solution. For me, most oils that are left on my scalp clog my pours and give me dandruff/itch. Sometimes I like to add a little teatree oil to my rinse out conditioner. Works wonders.
"A life without fame can be a good life, but fame without a life is no life at all." - Clive Davis