The invention relates to a sensor for measuring a physiological parameter of a subject, comprising: - a body (32) made of electrically insulating material, the body (32) comprising a base (31) and a plurality of protuberances (34) protruding from the base (31), and - a plurality of capacitive elements (37) which are made of electrically conducting material and are embedded inside the body (32), each capacitive element (37) being arranged inside the body (32) at the area of an end of the respective protuberances (34), such that, when the ends of the protuberances (34) are in contact with the skin of the subject, the capacitive elements are at a predefined distance from the skin.
