Poor appetite and nausea are associated with acute gastritis, peptic ulcers, and pregnancy. There are more causes of poor appetite, nausea and vomiting, common ones are bad eating habits, if eating spicy and irritating food or usual overeating will cause damage to the gastric mucosa, which will cause stomach discomfort and gastritis. Gastritis is an inflammation belonging to the mucous membrane area, after eating clear gas does not rise, turbid gas can not fall, the stomach can not be circulated, so it will produce stomach discomfort, nausea. Bad living and eating habits can lead to ulcers in the peptic tract area, and food intake can cause irritation to the ulcerated area, which can also cause stomach discomfort. Women of childbearing age who experience poor appetite and nausea should consider that it is caused by pregnancy. The body’s hormone level gradually increases in early pregnancy, which will affect the digestion of the gastrointestinal tract, and food stagnation in the stomach will also cause nausea and vomiting.