If the dizziness is vertigo, it is accompanied by autonomic dysfunction, and the patient may experience nausea during the dizziness episode and vomiting in severe cases. If vomiting is induced after eating, it is mostly associated with autonomic dysfunction of the gastrointestinal tract. The innervation of the gastrointestinal tract is the autonomic nerve, also known as the vegetative nerve. The peristalsis, smooth muscle movement and secretion of digestive juices in the gastrointestinal tract depend on the sympathetic and parasympathetic nerves, which are vegetative nerves. If the function is disturbed, after the patient eats, it will induce discomfort in the gastrointestinal tract, which can lead to vomiting in severe cases. If there is no food stimulation, the abnormality may be mild and tolerated by the patient. In patients with more severe dizziness, try to eat a liquid and mild diet to reduce irritation of the gastrointestinal tract.