The inability to remember things is a memory disorder that may be caused by physiological reasons or due to certain diseases. Physiological causes mainly include patients with prolonged mental tension, stress, prolonged sleep deprivation, and excessive staying up late may cause. Pathological causes mainly include patients with hypertension, if the blood pressure is too high may cause hypertensive encephalopathy, the patient can cause ischemia and hypoxia in the brain, in serious cases the patient may have memory impairment. If the patient has chronic cerebral blood supply deficiency, it may cause ischemic-hypoxic encephalopathy, and the patient may also develop memory impairment. If the patient is severely hypoglycemic, it may follow and hypoglycemic encephalopathy, and the patient may also develop. It may also be caused by intracranial organic lesions than cranial tumor, cerebral hemorrhage, cerebral infarction, encephalitis patients can appear. Patients in the early stages of Alzheimer’s disease can also develop memory impairment, mainly in the form of near memory impairment.