| abstract |
【Task】 (A) By combining one or more selected from the group consisting of α-hydroxy acid, salicylic acid, trichloroacetic acid and phenol, and (b) an acrylamide thickener, even at low pH, Provided is a skin external preparation with improved viscosity stability and excellent usability and stability. [Solution] (A) 1.0-7.0 mass% of 1 type (s) or 2 or more types selected from the group consisting of α-hydroxy acid, salicylic acid, trichloroacetic acid, and phenol; A skin external preparation containing 1 to 7.0% by mass and having a pH of 0.1 to 5.0. |