In layman’s terms, the vegetative nerves are nerves that cannot be controlled by subjective will at will, in contrast to the motor nerves that can be directly directed and controlled by the brain. In the human body, the vegetative nerves mainly refer to the sympathetic and parasympathetic nerves, which have opposite functions and regulate physiological functions such as blood pressure, heart rate, sweating, glandular secretion, gastrointestinal motility, urination and defecation. When the sympathetic nerve is excited, blood pressure rises, heart rate increases, sweat gland secretion increases, and pupils open wide. Parasympathetic nerve function is the opposite of sympathetic nerve function. When the parasympathetic nerve is excited, the heart rate slows down, saliva secretion increases, gastrointestinal peristalsis speeds up, and some people even experience abdominal pain, increased bowel movements, nausea and vomiting. Strictly speaking, phytodysfunction cannot be considered as an independent disease, but a group of disease symptoms with phytodysfunction as the main manifestation, such as chest tightness, shortness of breath, panic, abnormal fluctuation of blood pressure, abdominal distension and abdominal pain, nausea, abnormal sweating, baking heat feeling, etc. Many diseases have manifestations of plant nerve dysfunction. Common clinical diseases include: upright hypotension, Parkinson’s disease, peripheral neuropathy, neurosis, anxiety and depression disorders, menopausal syndrome, etc. Doctors will look for the cause of the disease according to the patient’s performance and examination, and receive better results according to the treatment from the root cause.