Eighty old people drink water are nausea and vomiting consider acute gastroenteritis, pyloric obstruction, intestinal obstruction and other digestive diseases, pharyngeal irritation and other conditions caused by. 1. Acute gastroenteritis: caused by infectious or non-infectious factors can appear vomiting, nausea and other symptoms, can also be accompanied by diarrhea, abdominal pain. 2. Pyloric obstruction: manifested as vomiting, epigastric distension and fullness, gastric peristaltic wave and other symptoms, resulting in nausea and vomiting even when drinking water. 3. Intestinal obstruction: it is an obstacle to the passage of intestinal contents caused by various reasons, which can be characterized by abdominal pain, abdominal distension, vomiting, and cessation of bowel movement and defecation. 4. Pharyngeal irritation: Smoking, violent coughing, nasopharyngeal inflammation will stimulate the pharynx, resulting in nausea and vomiting. Eighty-year-olds who experience nausea and vomiting with a sip of water are advised to go to the hospital and ask the doctor to make a judgment.