I wash my hair every morning. If I skip washing my hair one morning, it's not only greasy looking, but by the afternoon/ evening my scalp actually begins to hurt. It's like a headache on the crown of my head that just gets worse and worse until I wash my hair. After reading all of the articles out there about how washing every day can be damaging, I tried for a while to get by with shampooing every other day. On the off days I tried just using conditioner, or just using water and scritching my scalp in the shower, or not wetting it at all and just using dry shampoo. I had varying levels of success with these, but still, by the end of any day that I didn't use shampoo, my head would be killing me. No one that I've ever mentioned this to has ever experienced similar aching. Any clue what this is, and what I can do to avoid it?