Sleeping with the light on for a long time will affect the quality of sleep and make it difficult to fall asleep. Sleeping in the dark is a normal law of human life. Use it for work and study during the day and rest at night to replenish the energy of the day. If you sleep with the light on at night or in strong sunlight, it will affect the normal metabolic function of the human body, make the heartbeat, pulse and blood pressure abnormal, and easily lead to diseases. People who often work at night are twice as likely to get sick as normal people. For infants and young children, it is especially bad to sleep with the lights on, because the eyes of infants and young children are not well developed. If you turn on the light for a long time, it will cause fidgeting, emotional irritability and difficulty sleeping, which is also very unfavorable to the development of vision and damage to the retina.

From the perspective of traditional Chinese medicine, yin and yang refer to night and day respectively. Turning on the light to sleep will reverse black and white, leading to imbalance between yin and yang and disorder of human body. Then it will do great harm to the eyes, especially to children. As adults, their eyesight will also decline, and their eyes will feel astringent. It has a great influence on children's eyesight, because the body is still developing and prone to myopia, so wear glasses early; It can lead to endocrine disorders, especially for girls. If the lights are turned on for a long time, the estrogen in the body will be secreted in advance, leading to precocious puberty.

Turning on the light at night is not good for your skin at first. Light will affect the production and secretion of melatonin and reduce the immune function of human body. Second, it affects the quality of sleep, because light will affect the biological clock and adversely affect the natural regulation and growth of the body. If it really doesn't work, wear an eye mask when you sleep at night, so that even if you turn on the light at night, it will not affect the secretion of melatonin. In addition, trying not to get up at night will also affect the secretion of melatonin. If you have any uncomfortable symptoms, you'd better go to the hospital for examination.