In fact, one out of five Americans suffer from an itchy scalp. As common a problem as scalp itch is, those who are most affected by it are people who suffer from inflammatory skin conditions, such as seborrheic dermatitis or psoriasis. This condition of severe itching, dryness and scaliness results when these oil glands become clogged and inflamed. The cause of the recurring condition is unknown. Scratching the area can actually worsen the problem.
Psoriasis is a skin condition that can be found anywhere on the body.
Scientists believe it is a result of a gene that is passed down through families. Those with psoriasis can have new cells coming to the surface approximately every four days. This hyper-proliferation of cells causes them to bunch up at the surface, taking on the form of large, thick, white scales and sheets of skin that actually slough off in these large sheets. The bunching of the skin cells at the surface of the skin can lead to intense itching which, again, can be exacerbated by scratching. The scalp is an area where psoriasis often occurs.