Dry heaving and nausea during exercise may be caused by dietary factors, reflux esophagitis, chronic pharyngitis, chronic gastritis and other reasons. 1. Dietary factors: drinking a lot of alcohol or eating cold food in recent times, which stimulates the gastric mucosa, so nausea and dry heaving occur during exercise. 2. Reflux esophagitis: the sphincter of esophageal cardia is relaxed, and the gastric contents reflux during exercise, causing nausea and dry heaving. 3. Chronic pharyngitis: chronic inflammation of the throat, due to the inflammatory factor stimulation of local congestion, edema, exercise, inhalation of air to stimulate the throat, resulting in dry heaving, nausea. 4. Chronic gastritis: chronic gastritis patients will appear nausea, dry heaving, bloating, belching (hiccups) and other symptoms, exercise can aggravate dry heaving, nausea symptoms. Exercise dry heaving, nausea cause is more complex, it is recommended that timely medical treatment to identify the cause of early treatment.