Nausea and vomiting can have many etiologies. Chronic pharyngitis can also occur, and throat nausea and vomiting can occur when brushing teeth. Nausea can also occur if there is a disease of the liver. In addition, due to gastroesophageal reflux and chronic gastritis, nausea and vomiting can also be caused. Therefore, if nausea and vomiting occur, it is necessary to check the cause of the disease, whether there are abnormal sensations in the pharyngeal cavity, stomach, digestive system, liver or the whole body organs.