Dryness and oily in the scalp can cause itching that leads to flakes of skin that are white in colour fall off in small pieces. The cause of an itchy scalp may be dandruff, which is white or gray visible flakes falling off the head. The hair may be oily but still the flakes of skin keep falling from the head. They can sometimes be as large as a quarter inch and have an oily feel to them. Another symptom of dandruff can be redness in scalp or irritation that does not go away after a simple washing. In this case, the best way to treat this scalp problem is by drinking lots of water to re-hydrate your scalp. Natural oils in the hair should be allowed to regenerate by avoiding regular hair wash. A hair oil or a leave in conditioning treatment will let the body adjust to the new level of humidity in a few days and the scalp will return to normal.