An electrically conducting electrode 10 for connection to an electronic power supply 12 to deliver a stimulating signal for management and/or treatment of neurological or muscular pain. The electrode 10 comprises one or more active or stimulating surfaces 18, each shaped as a hemisphere with a diameter between 2-12 mm. Where each active surface 18 is covered by, or coated with, a layer of an electrically conducting hydrogel 20. Hydrogel layer 20 may be removably replaceable. Active surface 18 may be formed at an end of a rigid stem 16. Electrode 10 may be formed or shaped to fit or treat a specific anatomy part. Also a matrix, or array, comprising a plurality of electrodes 10 mounted on a stiff or semi-stiff backing, with the electrodes 10 provided with a connection for connection to an electronic power supply 12, and where the backing may be electrically conducting with an insulating coating between the electrode’s active surface 18 and where the electrodes’ active surfaces 18 may be in the form of separate buttons or inserts mounted on a thermo-formable, or curable backing comprising a substrate, or woven or non-woven material.
