Medical apparatus, namely, electrical nerve stimulators; Medical device, namely, a non-implantable modulating frequency generator, providing neuromodulation therapy to cranial and peripheral nerves; Medical apparatus consisting of percutaneously implantable arrays for transmitting current into auricular and peri-auricular tissue; Medical device for peripheral nerve and nerve field stimulation; Medical device consisting of a non-implantable modulating frequency generator and percutaneously implantable needle arrays for transmitting current into auricular and peri-auricular tissue for use in pain management and FGID (functional gastrointestinal disorders), namely, patient stimulator for auricular and peri-auricular peripheral nerve field neuromodulation therapy; Medical apparatus, for peripheral nerve field stimulation in cranial and peripheral nerves and occipital nerve branches, for pain control, FGID, irritable bowel, functional dyspepsia, functional abdominal pain, nausea, functional nausea, abdominal migraine, Crohn's Disease, visceral hypersensitivity, chronic inflammatory bowel disease, changes in FGID co-morbidities, sleep disturbances, psychological disorders, including mood and anxiety, satiety and changes in autonomic nervous system and other types of sympathetically mediated pain