Can not sleep at 2-3 pm, once in a while is not a big problem, may be due to thinking too much during the day, a temporary neurasthenia, at this time usually do not need special treatment. But if such symptoms occur more than three days in a week, for more than three weeks 2-3 points can not sleep, it is considered a sleep disorder, we must analyze the causes, the common causes are as follows: First, the poor quality of sleep caused by excessive stress, at this time prone to depression. Second, menopausal syndrome, with hormonal changes can lead to disorders in the nervous system, so that their emotions are affected, there is poor sleep quality when sleeping at night. Thirdly, neurasthenia, if after a fright leads to a state of nervousness often in a tight state, often causing poor sleep quality. If the poor sleep quality is caused by any of the above reasons and lasts for more than three months, the patient must consult a sleep specialist.