Which department should patients with autonomic nervous system dysfunction visit?

Patients experiencing symptoms suggestive of autonomic nervous system dysfunction—commonly referred to in non-technical or historical contexts as “vegetative nerve disorder” or “autonomic dysfunction”—should initially consult a neurologist. The autonomic nervous system (ANS) is an integral component of the peripheral nervous system, and its regulation of involuntary functions—including heart rate, blood pressure, gastrointestinal motility, pupillary response, and thermoregulation—falls squarely within the scope of neurologic evaluation.

However, because autonomic symptoms often overlap with those of other systemic conditions, a multidisciplinary approach may be necessary. For example, orthostatic intolerance or postural tachycardia syndrome (POTS) may warrant referral to cardiology or autonomic testing centers; gastrointestinal manifestations such as gastroparesis or chronic constipation may require gastroenterology input; and patients with prominent fatigue, sleep disturbances, or mood-related symptoms may benefit from collaboration with psychiatry or behavioral medicine—particularly when functional or stress-related contributors are suspected.

It is important to note that “vegetative nerve disorder” is not a formal diagnosis in modern medical classification systems (e.g., ICD-11 or DSM-5). Rather, clinicians aim to identify specific, evidence-based diagnoses—such as neurogenic orthostatic hypotension, autoimmune autonomic ganglionopathy, small fiber neuropathy, or functional neurological disorder—through targeted history, physical examination (including bedside autonomic testing), and objective investigations like tilt-table testing, quantitative sudomotor axon reflex testing (QSART), or skin biopsy for intraepidermal nerve fiber density.

Therefore, starting with a board-certified neurologist—ideally one with expertise in autonomic disorders—is the most appropriate first step. They can coordinate further diagnostic workup and referrals as needed to ensure comprehensive, patient-centered care.