When there is no appetite, only want to drink water situation may be due to improper diet, indigestion and diarrhea water loss and other situations. 1. Improper diet: for example, eating spicy and stimulating food may stimulate the gastrointestinal mucosa, or even damage the gastrointestinal mucosa, so there is only want to drink water and do not want to eat. Other foods such as too cold and too salty may also lead to this situation, in this case, generally only need to adjust the diet, eat more fresh fruits and vegetables, avoid eating spicy and greasy food. 2. indigestion: this is usually caused by gastrointestinal diseases, such as acute erosive gastritis, peptic ulcer and other diseases, usually accompanied by epigastric pain, nausea, as well as the symptoms of vomiting, manifested as a loss of appetite, do not want to eat, only want to drink water. In this case, you need to go to the hospital to complete the relevant examinations, identify the cause and carry out the appropriate treatment. 3. Diarrhea caused by: such as acute gastroenteritis caused by diarrhea leading to water loss, manifested as only want to drink water and loss of appetite. When a longer period of time, no appetite, only want to drink water should go to the hospital in a timely manner, as soon as possible to identify the cause of the disease and treatment.