Premenstrual insomnia has the following categories: First, it is a normal physiological phenomenon, women’s body hormone levels before menstruation will have significant fluctuations, such as sex hormones, thyroid hormones, adrenal cortical hormones, will affect the metabolism of substances in the female body, but also interfere with the central nervous system of the brain, leading to insomnia in women. Second, related to psychoneurological factors, because the relatively high pressure of life, work and other aspects can lead to cortical dysfunction of the brain, no normal regulation of emotions and biological rhythms, in a special physiological period of menstruation, all aspects of the female body have a greater change, can lead to insomnia before the menstrual period.