Nausea and vomiting after exercise may be caused by swallowing a large amount of air, slowing down of intestinal peristalsis, intracranial hemorrhage and other factors. 1. Swallowed a lot of air: exercise breathing may become rapid, and even the case of open-mouth breathing, at this time there may be a large amount of air was swallowed into the stomach, resulting in gastric distension, inducing nausea and vomiting feeling. 2. slow intestinal peristalsis: sympathetic nerve excitation during exercise may lead to slow intestinal peristalsis, which may appear indigestion, a large amount of food is stored in the gastrointestinal tract, nausea and vomiting may occur after exercise. 3. Intracranial hemorrhage: exercise, the heart rate will increase, may cause blood pressure, if the blood pressure is too high may lead to intracranial blood vessel rupture, so that the intracranial pressure increases, under the action of pressure, there may be nausea and vomiting after exercise. When nausea and vomiting after exercise occurs, you should consult a doctor in time, under the guidance of the doctor to improve the X-ray barium meal examination, physical examination, CT and other tests, to clarify the cause of the disease, and active treatment.