Nausea after eating can occur as a result of gastritis, food poisoning, ulcers or bulimia, according to WebMD. Gastroesophageal reflux disease often causes people to become nauseous after eating foods that aggravate the production of stomach acids, notes Healthline.
The intestines rely on a lower esophageal sphincter to manage the closure of the hole between the stomach and the esophagus, explains Healthline. In people who are diagnosed with GERD, this sphincter does not operate correctly, and stomach bile is able to exit into the esophagus after ingesting food. People may feel nauseous in response to tasting the regurgitated food that comes back up with acid reflux. High-fat foods are especially likely to cause nausea in GERD patients, because the body struggles longer to digest fat. Additional foods that aggravate symptoms of GERD include citrus fruits, peppermint, alcohol, tomatoes, sodas, coffee, chocolate and spicy foods. The easiest way to reduce the likelihood of developing nausea after meals is to avoid eating these foods and increase the amount of fiber and whole grains in the diet, notes Healthline. People should also break their meals up into smaller portions throughout the day to avoid over-stuffing the stomach. It helps to wear loose-fitting clothing that does not restrict the abdominal area.