A removable patch configured to be applied over a skin surface, comprises an adhesive layer disposed on the removable patch, and a delivery layer disposed on the removable patch. The delivery layer carries an activating chemical neuromodulator adapted to be transcutaneously applied to afferent A fibers disposed under the skin surface. The delivery layer further carries an inhibiting chemical neuromodulator adapted to be transcutaneously applied to C fibers disposed under the skin surface. A method for treating a patient suffering from a neurological disorder comprises transcutaneously applying an activating chemical neuromodulator over a skin surface adjacent to a trigeminal nerve tissue of the patient, and activating afferent A fibers in the trigeminal nerve, the activation being carried out by the chemical neuromodulator.
