Frequent yawning may be a manifestation of cerebral hypoxia, which can be clinically seen in a variety of diseases, such as hypertensive encephalopathy when the patient’s blood pressure is too high, and the patient may experience cerebral hypoxia, which may cause increased intracranial pressure in severe cases, and may also cause headache, nausea, vomiting, and may even cause the patient’s memory loss and inattention. Long-acting preparations to make the patient’s blood pressure stable can not be high or low, the commonly used drugs in clinical practice include levloclodipine, amlodipine benzoate, valsartan, candesartan and irbesartan. If the patient has insufficient blood supply to the brain may also cause brain hypoxia, common causes include narrowing of blood vessels, cerebral atherosclerosis. If a patient has diabetes or hyperlipidemia, increased blood viscosity and slow blood flow may also cause cerebral hypoperfusion, and patients with severe hypotension may also suffer from cerebral hypoxia. It may also be caused by heart disease, such as severe arrhythmia and coronary heart disease, patients may have reduced heart pumping function, which may easily cause cerebral hypoperfusion, and may also easily cause cerebral hypoperfusion, and patients may also suffer from cerebral hypoxia.