A stimulator pad includes a layer of support material and at least one stimulator node secured to and supported by the support layer, the stimulator node comprising a housing having one end region secured relative to the support layer and the other end defining an aperture which in use confronts a body surface and in which at least one pressure member includes a plurality of pressure member components is resiliently located, resilient biasing device provided within the housing to act between the support layer or a base portion of the housing and at least some of the pressure member components to urge the at least some of the pressure member components to protrude through the housing aperture, and a layer of flexible cover material which extends over at least one of the pressure members.