The presence of memory confusion indicates the occurrence of memory impairment, false recollection and conviction of events experienced in the past, in terms of place of occurrence, circumstances and especially time. It is generally considered to be dementia, a group of acquired clinical syndromes characterized by multiple cognitive deficits. It is often caused by neuropathy or secondary to diseases such as vascular anomalies, including Alzheimer’s disease, dementia secondary to organic brain lesions, and may also be seen in amnesic syndromes, etc. 1. Alzheimer’s disease: It is the most common type of primary degenerative dementia, and patients may show memory confusion, which is a prominent symptom in the early stages of the disease, especially in the recent memory impairment. Patients will often forget what happened recently, including the food being steamed, the location of keys and cell phones, and even in the late stages of the disease, patients will not recognize their family members and do not know their names, etc.; 2, organic brain lesions secondary to dementia: such as traumatic brain injury, intracranial infection, cerebral hypoxia, cerebrovascular lesions and other causes of dementia, manifested as memory confusion, and memory, comprehension, judgment, as well as work and learning ability to decline; 3, amnesia syndrome: belongs to one of the common diseases of mental illness syndrome, also known as Korsakoff syndrome, mainly manifested as recent memory confusion, mostly seen in chronic alcoholism-induced neurological disorders, cranio-cerebral injury-induced mental disorders, etc.