Elderly people with dementia can discuss hospitalization with their doctors when the following conditions occur: 1. There are many different causes of dementia and different treatment methods. In addition to the commonly referred to Alzheimer’s disease dementia, some are due to cerebrovascular disease, metabolic disease, nutritional deficiency disease, hydrocephalus, etc. Some of these can be reversed or even cured with treatment. Short-term inpatient treatment can help identify whether an elderly person has dementia and what type of dementia he or she has, so that a professional treatment and care plan can be developed for the elderly, which will facilitate long-term care. In addition, short-term inpatient treatment for systematic and comprehensive checkups can save the trouble of going back and forth to outpatient clinics, which is an option to be considered for elderly people with dementia who have difficulty moving. In addition to poor memory, many elderly people with dementia also have mental behavior problems, such as talking repeatedly in the mirror, saying that their deceased relatives are around, walking around aimlessly, asking the same question repeatedly, hitting others, losing temper, sleep disorders, hallucinations, delusions, etc. When these mental behavior symptoms pose a threat to themselves or others around them, it is recommended to seek medical attention and hospitalization if necessary. 3. Patients with dementia usually have a combination of other chronic illnesses, and as they age, the disease progresses and their systemic function declines, the chances of suffering from complications (such as aspiration pneumonia, malnutrition, urinary tract infections) and accidents (such as falls and fractures, accidental aspiration, trauma) increase greatly. Sometimes these co-morbidities or complications are the reason why patients need to be hospitalized.