The reasons for headaches after running are mainly the following: first, insufficient blood supply to the cerebral arteries, most of the body’s blood supply to the limbs during running, strenuous exercise is likely to cause transient ischemia and hypoxia in the brain after running, thus causing headache symptoms, which can be relieved by adequate rest and adjustment of breathing. Second, hypoglycemia, if it is in a hungry environment or unsuitable environment for strenuous exercise, it is easy to accelerate the metabolism of energy in the body, when the brain can not get enough energy, it is easy to cause oxygen supply, insufficient blood supply, resulting in headache symptoms, strenuous exercise before the need to choose the right environment, the right time to carry out. Third, hypertension, when strenuous exercise is likely to cause an increase in blood pressure, resulting in vasodilatory headaches, mostly seen in patients with hypertensive underlying diseases. When the headache occurs need to immediately monitor the blood pressure situation, serious cases take antihypertensive drugs to control blood pressure, stable after the symptoms can be relieved or disappear.