A method of treating a skin or scalp disorder is disclosed. The method calls for topically (a) administering to a subject in need thereof a therapeutically effective amount of a composition has at least one oligomeric or polymeric form of a monoterpene, and is substantially devoid of the corresponding monomeric form of said monoterpene, and (b) treating a skin or scalp disorder. The monoterpene is selected from the group consisting of alloocimene, limonene, α-pinene, β-pinene, geranyl acetate, α-phellandrene, γ-terpinene, 3-carene and 2-carene, and a pharmaceutically acceptable carrier； and wherein the composition is substantially devoid of the corresponding monomeric form of said monoterpene.
