mustard plaster: a plaster containing powdered black mustard; applied to the skin as a counterirritant or rubefacient
poultice: a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.
staff member: an employee who is a member of a staff of workers (especially a member of the staff that works for the President of the United States)