fo·men·ta·tion 
(fō′mən-tāshən, -mĕn-)
(fō′mən-tāshən, -mĕn-)n.
1. The act of fomenting; incitement.
2.
a. A substance or material used as a warm, moist medicinal compress; a poultice.
b. The therapeutic application of warmth and moisture, as to relieve pain.