Onions are stimulating food, nausea after eating onions may be due to the stimulation of the gastric mucosa and the phenomenon. Onions are rich in chorine and dietary fiber, on the gastrointestinal tract peristalsis, improve appetite has a certain effect, but to be used appropriately, should not be too much to eat, because onions belong to the stimulating food, too much to eat may stimulate the gastric mucosa, causing nausea and vomiting, and even the phenomenon of gastric distension. If you have nausea, you can walk after meals, yoga and other ways to relieve the symptoms of nausea, you can also eat some gastrointestinal tablets to promote the digestion of food, so as to alleviate the phenomenon of nausea, if there is a lack of gastrointestinal dynamics of the crowd can take domperidone treatment, the drug needs to be applied under the advice of a doctor. If nausea occurs repeatedly after eating, hospitalization is recommended.