What is vomiting often?

Often nausea, vomiting, normal is due to pregnancy, hypoglycemia, stomach cancer, gastrointestinal dysfunction and other reasons. Women during pregnancy because of embryonic development, and caused by blood HCG and progesterone increased, so it will cause stimulation of the digestive system, causing early pregnancy reactions, such as nausea, vomiting, lethargy, etc. Gastric cancer in the disease period, due to the spread of cancer cells will affect the stomach function, resulting in stomach food can not be digested in time, and cause irritation to the stomach wall, then it will cause nausea, vomiting and other performance. Gastrointestinal dysfunction is related to vegetative nerve dysfunction, especially when it shows bad mood, it is more likely to attack. Gastrointestinal dysfunction will not only cause food in the stomach not to be digested in time, but also cause gastrointestinal reverse motility, so it will cause nausea and vomiting symptoms.