Abstract: A bag-on-valve aerosol container includes a chamber, where a pressurized gas is contained, surrounding a flexible bag, and where a closable outlet is in fluid communication with the flexible bag. The flexible bag includes a leave-on dermatological composition having an oil-in-water emulsion, comprising one or more oils, the emulsion having an oil phase to water phase ratio of between 1:1 and 1:25; one or more oil-in-water emulsifiers; and one or more active dermatological ingredients. The leave-on dermatological composition has a viscosity at room temperature of between 1 and 20,000 mPa·s. The product compartment further includes one or more physical foaming agents having a standard boiling point of ?50 to 70° C.