A cranial electrotherapy stimulation (CES) device includes a head support, a control unit configured to provide a stimulating current, and a primary arm module. The primary arm module includes a primary arm and an electrode unit. The primary arm is pivotally connected to the head support and is longitudinally extendible. The electrode unit is disposed at the primary arm and includes an electrode that is electrically coupled to the control unit and that forms a path for transmission of the stimulating current to a stimulating point of a subject when the electrode is placed in direct contact with the stimulating point.
