High school students in the afternoon on the dizziness and want to vomit may be due to fatigue and other physiological factors, can also be caused by disease factors. 1. Physiological factors: due to the high school students heavy learning tasks, excessive brain rest in the morning, or due to the lunch break cold and other reasons can lead to dizziness in the afternoon, accompanied by nausea and vomiting symptoms. 2. Disease factors: due to anemia leading to insufficient blood and oxygen supply to the brain, or suffering from anxiety, depression and other mental illnesses can also appear in the afternoon dizziness symptoms. In addition, high school growth in the morning for a long time to study easily caused by neck muscle stiffness and tension, resulting in cervical intervertebral disc compression of the peripheral nerves, can also cause dizziness in the afternoon and want to vomit symptoms. When often appear in the afternoon dizziness should be appropriate rest, if no relief after rest, or more serious symptoms should be promptly diagnosed and treated, so as not to delay the condition, resulting in serious consequences.