If the patient has nausea in the stomach mainly consider the following causes: 1, consider the pregnancy reaction, in the early stages of pregnancy due to the female body estrogen levels rise, stimulating the center will lead to pregnant women will have nausea, vomiting. 2, the patient has gastrointestinal power deficiency, mainly due to gastrointestinal peristalsis slowdown, the food eaten can not run down in time, food in the stomach for too long will lead to nausea. 3, consider the patient eating too much. 4, consider the patient infected with H. pylori, H. pylori colonization has led to flora disorders, there will be a series of stomach symptoms, such as acid reflux, nausea, pain. 5, consider the patient’s vertebral artery is compressed and caused by the disease, such as spinal stenosis leads to insufficient blood supply to the brain, vertigo, nausea. 6, consider otoliths or seasickness caused by nausea.