the hot medicinal compress apparatus is a therapeutic and hearth care medical device which has heating , medicament and rolling functions . it includes a heater and a cartridge carrying a medicinal compress layer . the heater includes a heating element and a heat conducting tube in which the heating element is mounted and at both ends of which a front round step member and a rear round step member having a through hole are respectively arranged ; at another end of the front round step member , a washer and a demountable baffle ring are provided and fixed by a screw nut , while at another end of the rear round step member , a handle is arranged , in which a through hole is provided and on which a control switch is mounted . the cartridge is comprised of a metal tube and a medicinal compress layer which is wrapped around the metal tube .