The stomach is always nauseous, usually caused by the following causes: 1, for women should first rule out pregnancy reaction, nausea during pregnancy is a normal physiological phenomenon. 2, chronic pharyngitis, pharyngitis patients usually feel a foreign body, itching, pain in the throat, accompanied by nausea, vomiting feeling, mostly because of irregular diet, or eat too much spicy, irritating food and caused by smoking, drinking, also 3, hypertension, mostly seen in the elderly when blood pressure rises, there will be dizziness, nausea, weakness, especially in the morning when you wake up, blood pressure is particularly likely to rise. 4, gastrointestinal diseases, suffering from acute and chronic gastritis, gastric ulcer, duodenal ulcer and other gastrointestinal diseases, gastrointestinal dysfunction, gastrointestinal easy to reverse peristalsis, there will be symptoms of nausea, usually accompanied by pain in the upper abdomen It is usually accompanied by pain in the upper abdomen, bloating, belching, acid reflux, etc.