If a patient becomes dizzy after running, there are usually several factors as follows: 1. The most common factor is excessive exercise, which leads to a transient hypoglycemic reaction, and clinical symptoms and manifestations such as dizziness, palpitations and hand tremors will appear when hypoglycemia is present. 2, long-term lack of exercise, if suddenly engaged in strenuous exercise, there will be shortness of breath, pale face, muscle twitching, etc. This is because the level of function of the respiratory organs of the body, and can not adapt to the intense exercise and the resulting reaction. 3, the rhythm of breathing during exercise is not well mastered, so there will be hyperventilation, hyperventilation leads to the body of carbon dioxide exhaled not much, oxygen inhalation is not enough, then there will be a lack of oxygen and lead to dizziness and dizziness clinical symptoms. 4, for patients with previous hypotension, running will lead to a transient cerebrovascular blood supply deficiency, which will also cause dizziness and blurred vision.