Dry heaving can be caused by a variety of reasons, pregnancy reaction, chronic pharyngitis, gastritis, hepatitis and renal insufficiency may appear this symptom. 1, if a woman has had coitus, frequent dry heaving, you need to do a blood HCG test to see whether the pregnancy, the pregnancy reaction belongs to the physiological changes can be consumed vitamin B6 to improve. 2, dry heaving when you get up in the morning or brushing your teeth, considered to be the result of chronic pharyngitis, with abdominal distension, belching dry heaving, to consider the gastritis caused. 3, dry heaving caused by hepatitis, mostly accompanied by vague pain in the upper right abdomen, urination and yellow skin and other symptoms. 4, kidney insufficiency. The first thing you need to do is to take a look at the actual body of the person you’re talking to and then you’ll be able to see what you’re doing. These causes of dry heaving, need to be through the pharyngeal manual examination, as well as gastroscopy, liver function, renal function and other items of the test to determine the specific belong to that kind of situation.