Always dry heaving, consider the existence of diseases in the digestive tract itself and other system organs lead to: 1, functional diseases of the digestive tract, such as pancreatic achalasia, esophageal dysfunction, functional eructation, functional heartburn, functional abdominal pain, etc., need to do a gastroscopy to rule out organic lesions of the digestive tract, partly related to the emotional and mental state. 2, the upper gastrointestinal tract organism lesions, such as common acute erosive hemorrhagic Gastritis, chronic gastritis, peptic ulcer disease, reflux esophagitis, nausea and vomiting symptoms due to gastrointestinal mucosal lesions, need further drug treatment.3, other systemic organ disease secondary nausea, vomiting symptoms, such as intracranial neuropathy, cerebellar-related diseases, diabetic ketoacidosis, renal insufficiency and other diseases, focusing on treatment of the primary disease.