OILY SCALP ORIGINS
Oil doesn’t always mean bad news. Sebum, the natural oil produced by the skin’s sebaceous glands, acts as a layer of protection to keep the scalp from losing moisture and drying out. But too much sebum can leave your scalp and hair greasy, which can break you out in dandruff. In addition, the fungus Malassezia can thrive on oily areas of the scalp when its irritants penetrate the weakened scalp barrier, worsening your dandruff symptoms.