The present invention provides a foam skin coating agent which takes into account safety and maintains good foam at low temperature when it is in 0.7MPa under pressure, and enables carbon dioxide to act on the skin for a long time to obtain sufficient blood circulation promoting effect. The foam skin coating agent of the invention is filled with a liquid and gas composition filled into a pressure vessel to make the internal pressure less than 0.70MPa at 25 degrees Celsius. The composition of the liquid and gas comprises the following components (A), (B) and (C):(a) carbon dioxide(b) a mixture of hydrocarbons having a carbon number of 3 to 5 and having a vapor pressure of more than 0.1MPa and less than 0.5MPa at 35 u00b0 C and a content of 70 to 100% by mass of the hydrocarbon mixture of 0.1 to 3% by mass(c) interfacial active agent 0.1-25% by mass, andThe mass ratio (A: b) between (a) and (b) is 35:65-95:5.本發明提供一種考慮到安全性，於內壓未滿0.7MPa之氣溶膠中在低溫時亦保持良好的泡沫，並使二氧化碳長時間作用於皮膚上而獲得充分的血液循環促進效果之泡沫狀皮膚塗敷劑。本發明之泡沫狀皮膚塗敷劑係將液體及氣體之組合物填充至耐壓容器內使內壓於25℃下未滿0.70MPa而成者，上述液體及氣體之組合物包含以下成分(A)、(B)及(C)：(A)二氧化碳(B)選自碳數為3~5之烴的混合物，且上述混合物中於35℃下之蒸汽壓為0.1MPa以上且未滿0.5MPa的飽和烴之含量為70~100質量%之烴混合物0.1~3質量%(C)界面活性劑0.1~25質量%，且(A)與(B)之質量比(A：B)為35：65~95：5。
