A night without sleep, also known as difficulty sleeping, is a type of insomnia, caused by a number of reasons, the common causes are mainly the following aspects: first, physiological factors, with the growth of age, people’s sleep time will be correspondingly shortened, easy to cause difficulty falling asleep, sleep maintenance time is short, easy to wake up early and other symptoms, for this situation, can take tranquilizing drugs to help sleep class symptomatic treatment. Secondly, environmental factors, such as unsuitable indoor temperature, too strong light, sleep environment is too noisy and other factors can also affect the sleep situation, resulting in insomnia, dreamy. Third, drug factors, many drugs are easy to excite the central nervous system, such as aminophylline, caffeine and glucocorticoid drugs can lead to sleep disorders, insomnia, excessive dreaming symptoms. Fourth, the disease factor, such as plant nervous disorders, hyperthyroidism, anxiety, depression and other patients will often be accompanied by sleep disorders, need to treat the cause of the original disease in order to effectively improve the symptoms.