The present invention relates to an anti-itching agent that prevents itch of skin and a method for treating itching. An emulsion, which is produced when sebum and sweat continuously secreted are mixed, contains a stimulatory composition having aqueous and oily properties and can be a causative agent of itch. In addition, the emulsion can be a cell disorder composition. Furthermore, the emulsion causes itching and becomes a causative agent triggering and promoting dermatitis. The problem can be solved by blocking the emulsion by a skin-degenerative stratum corneum, which is formed by an action of an aluminum chloride and water, the aluminum chloride and a cyclodextrin. A polyphenol compound or a tannic acid can be also contained.
