counterirritant
Concise Oxford English Dictionary © 2008 Oxford University Press:
counterirritant/kaʊnt(ə)rˈɪrɪt(ə)nt/
▶noun chiefly historical something such as heat or an ointment that is used to produce surface irritation of the skin, thereby counteracting underlying pain or discomfort.
– derivatives
counterirritation noun.
counterirritation noun.
'counterirritant' also found in these Oxford entries:

