The reasons for vomiting in uremia are the following: First, toxin stimulation, uremia is the end stage of chronic renal failure, the loss of kidney function, toxins can not be excreted out of the body, accumulating in the body to stimulate the gastrointestinal tract and other organs, if toxins stimulate the gastrointestinal tract can cause nausea, vomiting and other symptoms. Second, water and sodium retention, uremic patients at this time the loss of kidney function to produce and metabolize urine, water can not be excreted out of the body caused by water and sodium retention, the patient’s gastrointestinal mucosa edema, poor digestive capacity, so nausea, vomiting and other symptoms. Third, improper diet, uremic patients taking food that stimulates the gastrointestinal tract, such as onion, garlic, chili pepper, etc., can cause nausea, vomiting and other symptoms.