Provided is a dermatitis treatment agent for orally administration, and the dermatitis treatment agent contains a compound represented by the follow formula-X-C(CH3)=CH-CH=CH-C(CH3)=CH-CH=CH-CH=C(CH3)-CH=CH-CH=C(CH3)-Y-Z or the pharmaceutically acceptable salt thereof. In said formula, W is 4-hydroxyl-2,6,6-trimethyl-1-cyclohexenyl, etc., X and Y are vinylene, etc., Z is 4-hydroxyl-2,6,6-trimethyl-3-keto-1-cyclohexenyl, etc.本發明之課題為提供作為經口投予劑之皮膚炎治療劑。本發明提供含有以下通式W-X-C(CH3)=CH-CH=CH-C(CH3)=CH-CH=CH-CH=C(CH3)-CH=CH-CH=C(CH3)-Y-Z所表示之化合物或該等藥學上容許之鹽，作為經口投予劑之皮膚炎治療劑。上述通式中，W可列舉4-羥基-2,6,6-三甲基-1-環己烯基等，X及Y可列舉伸乙烯基等，Z可列舉4-羥基-2,6,6-三甲基-3-酮-1-環己烯基等。
