Symptoms of dry heaving and nausea can be seen in physiological factors such as early pregnancy, but also in pathological factors such as gastrointestinal diseases, pharyngitis, viral hepatitis, meningitis, pancreatitis and other diseases. 1. Early pregnancy reaction: If women of childbearing age experience symptoms such as dry heaving and nausea, they need to consider whether it is early pregnancy, which can be clearly diagnosed through the menstrual history and urine HCG test. 2. Gastrointestinal diseases: Gastroenteritis is mainly caused by bacterial and viral infections, consumption of irritating foods, drugs and other factors, mainly manifested as abdominal pain, diarrhea, nausea, vomiting and other symptoms. 3. Viral hepatitis: this disease is an infectious disease caused by hepatitis virus infection, mainly liver damage, mainly manifested as nausea, vomiting, jaundice, lack of appetite and other symptoms. 4. Meningitis: this disease is a meningitis lesion caused by bacterial, viral and fungal infections, which is mainly characterized by fever, headache, neck stiffness, nausea and vomiting. 5. Pancreatitis: usually associated with gallstones, biliary tract infection, excessive alcohol consumption and other factors, manifested by acute abdominal pain, fever, nausea and vomiting and other symptoms. Different diseases have different treatments, it is recommended to go to the hospital in time for a clear diagnosis and treatment with the help of the doctor.