Alzheimer’s disease without sleep at night can occur in early, middle and late stages, and also need to be combined with other clinical symptoms to determine which stage it belongs to. 1. Early stage of Alzheimer’s disease: If the patient is accompanied by insomnia, he or she will not sleep at night, often accompanied by memory loss and other symptoms. Alzheimer’s patients who drink tea or coffee at night, which causes central nervous system excitement, may also not sleep at night. 2. Middle stage of Alzheimer’s disease: mental abnormality will gradually appear, and the patient will not sleep at night, accompanied by a decline in acquired knowledge and ability, and inability to learn new knowledge. 3. Late stage of Alzheimer’s disease: There is a significant decline in intelligence, change in personality, loss of ability to work, and prolonged confinement to bed, which can also lead to sleepless nights. When suffering from Alzheimer’s disease, you should seek medical treatment in time to slow down the progress of the disease.