Nausea and vomiting on an empty stomach are associated with gastritis, chronic pharyngitis, liver and gallbladder disease, pregnancy and other factors. Nausea and vomiting are some of the clinical aspects of the symptoms. The main consideration is eating unclean and undigested food in the diet, such as cold watermelon and overnight food infected by bacteria, all of which can cause acute gastroenteritis leading to stomach discomfort. Chronic pharyngitis patients after a night, the throat area will have more mucus exudation, local stimulation will also cause local muscle spasm, so the morning fasting, especially when brushing teeth more likely to nausea, dry vomiting. Liver and gallbladder disease is a digestive tract disease, patients are prone to nausea, anorexia, nausea and vomiting when they see greasy food, so they can go to the hospital for ultrasound examination and timely treatment. In addition, women’s body hormone levels gradually increase after pregnancy, which will affect the digestive system of the gastrointestinal tract, so it is also easy to have stomach discomfort when fasting.