Squatting up headache may be the following situations: 1. It is a normal physiological situation, because when a person squats leads to an increase in the amount of cardiac blood return, causing a certain rise in blood pressure. When a person gets up due to a sudden decrease in the amount of cardiac blood return, it will cause a temporary drop in blood pressure. In this process the cerebral blood vessels will be stimulated by a certain expansion and pull, thus causing a headache, which is a normal neural reflex regulation. 2, may be because of cerebrovascular diseases, such as common cerebral embolism, cerebral infarction or cerebrovascular malformation. When suffering from these vascular diseases, with the change of squatting and then rising position, will also have a negative impact on the cerebral blood vessels. In this process will trigger the lesion parts of the blood vessels are more serious injury stimulation, will also cause headache this situation.