The symptoms of chest tightness, nausea, dry heaving have the following reasons: 1, consider the gastrointestinal tract infection caused by oral antibiotics for treatment, such as cephalosporins or omeprazole, gastrofibromyalgia, etc.; 2, cardiac diseases, such as cardiac insufficiency, coronary artery disease, cardiac infarction, etc.; 3, consider lung infection or bronchial infection caused by the need to draw blood to determine whether it is viral or bacterial infection, and also to do chest X-ray examination, according to the type and degree of infection for appropriate treatment. Also need to do chest X-ray examination, according to the type of infection and the degree of infection for symptomatic treatment; 4, if the early pregnant women will also appear nausea, dry heaving, chest tightness symptoms. So different patients can be based on their own situation for the initial judgment, if the symptoms are not relieved in a short period of time, it is best to go to a regular hospital for scientific diagnosis, the disease must be early detection, early treatment.