There are many causes of headache and dizziness, physiological as well as pathological causes can lead to, such as lack of sleep, heatstroke, hypoglycemia, cardiovascular disease, anemia and other diseases, common causes include the following: a. Physiological causes patients because of recent work pressure, physical as well as mental fatigue, but can not get a good rest, resulting in the brain has been in a working state, the brain cell tissue Supply can not keep up, causing headaches and dizziness. Second, pathological causes 1, heat stroke: the patient is in a high temperature, high heat and non-ventilated environment, the body temperature has been in a rising trend, so that the body’s thermoregulatory center is affected, can not be normal heat dissipation, affecting the central nervous system, headache, dizziness; 2, hypoglycemia: fasting state, the patient’s blood glucose concentration <2.8 mmol/L, brain cells can not be normal oxygen supply, causing sympathetic excitation; 3. Blood pressure abnormalities: whether the blood pressure is lower than normal or higher than normal, the patient will experience dizziness and headache, which will also be accompanied by black haze, requiring dynamic monitoring of blood pressure to avoid triggering syncope and shock. It may also be a change in position, a drop in blood pressure caused by transient dizziness; 4, cardiovascular disease: the body's circulating blood volume is insufficient, the patient's heart muscle as well as the brain can not be properly supplied with oxygen; 5, infectious diseases: especially central nervous system diseases, such as viral encephalitis, or febrile diseases, inflammatory mediators dilate blood vessels, making the brain congested, will also appear dizziness, headache; 6, poisoning: drugs, food or some chemical substances may cause dizziness, such as alcohol, carbon monoxide, etc. Most patients with chronic poisoning have no conscious symptoms. In addition to dizziness, patients may also have tinnitus symptoms; 7, cerebrovascular disease: caused by abnormal lesions in the arteries of the brain, more commonly caused by ischemia or embolism of the vertebral basilar artery system, transient cerebral ischemia, cerebral infarction, etc.; 8, anemia: the body's own blood volume is insufficient, the amount of oxygen carried in the blood is insufficient, so that tissues and organs, cells can not be metabolized normally, especially the brain cells are more heavily affected, so there are Dizziness and headache symptoms.