Abstract: A treatment system and method for inducing endogenous release of peptides is provided including a concha apparatus including a first electrode in contact with vagal related neural structures; an earpiece connected to the concha apparatus by a first connector, the earpiece including a PCB layer including a second electrode configured to be in contact with a neural structure related to the auriculotemporal nerve, and at least another electrode configured to be in contact with or in proximity to neural structures related to the great auricular nerve and/or its branches and/or the lesser occipital nerve and/or its branches, and an adhesive configured to secure the electrodes on the earpiece to the skin; and a pulse generator connected to the earpiece by a second connector, the pulse generator including circuitry in communication with the first electrode of the concha apparatus, the second electrode and the at least another electrode of the earpiece.