Nausea when I eat. What's wrong?

Gastritis:

Helicobacter pylori infection in patients, leading to gastric mucosal damage, causing gastritis, food stimulation to the site of ulceration, patients will appear upper abdominal discomfort, nausea, vomiting, black stool and other symptoms.

Gastric ulcer: if patients eat spicy food for a long time, will lead to gastric mucosal stimulation ulcer, common symptoms are gastric burning pain, nausea, vomiting, stomach distension, belching and so on.