The causes of sleeplessness in the elderly mainly include reduced sleep demand, emotional disturbances, psychological factors, drug factors, etc., as follows: First, less sleep demand: because as age increases, the need for sleep in the elderly will have reduced. Second, emotional disturbance: there are triggers that cause insomnia exist, such as when a major, unexpected event in life occurs after, resulting in emotional instability, excitement, anxiety, nervousness and other such emotions in the elderly, may cause patients to have difficulty falling asleep, insomnia, dreamy and other problems. Third, psychological factors: the elderly usually sleep poor quality, mental and psychological aspects will be overly nervous, excessive concern about sleep, this situation is not beneficial for insomnia, and will make the symptoms of insomnia aggravated. Fourth, drug factors: the elderly can not sleep, but also may be caused by certain drugs, such as the use of thyroxine caused by human excitement, etc..