As dementia progresses, people with dementia often experience symptoms that are unbelievable to the average person, psychiatric symptoms. Because demented seniors have memory loss and don’t remember where they put things, seniors can’t find the items they’ve placed, and thus become suspicious that someone else is stealing. This is a common delusion of theft in dementia patients. Mr. Chen suspected that his partner was unfaithful to him, saying that his partner was having an affair, and that his partner was looking for another man outside, and for this reason, he scolded his partner and pinched his partner, which belongs to the typical jealousy delusion, and Mr. Chen suspected that his partner had harmed him, and suspected that his partner had put poison in the water he drank and ate, which belongs to the persecution delusion. These delusional symptoms are more sporadic, sometimes with and sometimes without, and schizophrenic delusions are different. In fact, dementia will also have some of the following symptoms: (1) hallucinations The more common symptoms of hallucinations are hallucinations and hallucinations, such as the patient can see other people come into the room to steal things, see the dead relatives; sometimes you will hear someone talking in your ear, you can only hear the sound of the talk and can not see the person, the voice may be in the chat, or in the discussion of their own good or bad. (2) Emotional disorders Emotional aspects are mainly characterized by depression, upset, anxiety, nervousness, fear, and some patients have negative and anorexic words and thoughts. This may be related to the patient’s poor memory and decreased judgment. The patient may worry about his poor ability to live, not being able to fulfill his own and other people’s requirements, and may also worry about his money and things being taken away by other people, and whether his body and life expectancy are failing, and thus show emotional disorders. Some other patients may show symptoms such as emotional instability, easy to lose temper, emotional vulnerability and goofiness. Of course, when the dementia develops to severe dementia, the patient’s emotional expression will again be flat or indifferent, indifferent to the things and stimuli around, with little emotional response. (3) Behavioral Abnormalities The patient may exhibit a variety of blind or repetitive behaviors, such as repeatedly moving objects and packing clothes; some patients may walk around constantly and repeatedly ask to go out; some patients may pick up garbage and trash outside and take it home to collect it. Of course, some patients show reduced activity, sitting at home all day, unwilling to go out. Some patients also have aggressive behavior, mainly verbal and physical attacks, such as cursing and hitting others if they don’t get what they want, defying others to take care of their lives, refusing to take a bath or change clothes, and even hitting, biting and kicking others. (4) Eating and sleeping disorders Patients mainly show that their diets are reduced until they become malnourished; a small number of patients also show that they do not know whether they are hungry or full and repeatedly ask for something to eat. We know that the general old people have reduced sleep time and are easily fatigued during the day. This characteristic of dementia patients is even more obvious, manifested as short sleep time at night, not deep sleep, easy to wake up. With the aggravation of the disease, patients show that they sleep during the day, sleepless at night, noisy all night. (5) Disorders of consciousness If the dementia patients are accompanied by serious physical diseases, such as heart and lung infections, heart, liver and kidney dysfunction, severe malnutrition, etc., then the patients’ brain dysfunction will cause disorders of consciousness. (6) Sexual dysfunction General dementia patients, especially male dementia patients often show sexual dysfunction, which is related to the patient’s whole day function decline. Individual patients may have other abnormal sexual dysfunction, such as sexual assault, love to find the opposite sex.